ID CVE-2011-1526
Summary ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script.
References
Vulnerable Configurations
  • cpe:2.3:a:mit:kerberos:5-appl_1.0.1
    cpe:2.3:a:mit:kerberos:5-appl_1.0.1
CVSS
Base: 6.5 (as of 12-07-2011 - 08:56)
Impact:
Exploitability:
CWE CWE-264
CAPEC
  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Access
VectorComplexityAuthentication
NETWORK LOW SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2011-0920.NASL
    description Updated krb5-appl packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and rlogin clients and servers. While these have been replaced by tools such as OpenSSH in most environments, they remain in use in others. It was found that gssftp, a Kerberos-aware FTP server, did not properly drop privileges. A remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526) Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter. All krb5-appl users should upgrade to these updated packages, which contain a backported patch to correct this issue.
    last seen 2019-02-21
    modified 2018-11-26
    plugin id 55520
    published 2011-07-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=55520
    title RHEL 6 : krb5-appl (RHSA-2011:0920)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2012-0168.NASL
    description An updated rhev-hypervisor5 package that fixes several security issues and various bugs is now available. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A heap overflow flaw was found in the way QEMU-KVM emulated the e1000 network interface card. A privileged guest user in a virtual machine whose network interface is configured to use the e1000 emulated driver could use this flaw to crash the host or, possibly, escalate their privileges on the host. (CVE-2012-0029) A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query() function. An attacker able to send certain IGMP (Internet Group Management Protocol) packets to a target system could use this flaw to cause a denial of service. (CVE-2012-0207) A double free flaw was discovered in the policy checking code in OpenSSL. A remote attacker could use this flaw to crash an application that uses OpenSSL by providing an X.509 certificate that has specially crafted policy extension data. (CVE-2011-4109) An information leak flaw was found in the SSL 3.0 protocol implementation in OpenSSL. Incorrect initialization of SSL record padding bytes could cause an SSL client or server to send a limited amount of possibly sensitive data to its SSL peer via the encrypted connection. (CVE-2011-4576) It was discovered that OpenSSL did not limit the number of TLS/SSL handshake restarts required to support Server Gated Cryptography. A remote attacker could use this flaw to make a TLS/SSL server using OpenSSL consume an excessive amount of CPU by continuously restarting the handshake. (CVE-2011-4619) Red Hat would like to thank Nicolae Mogoreanu for reporting CVE-2012-0029, and Simon McVittie for reporting CVE-2012-0207. This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers : CVE-2006-1168 and CVE-2011-2716 (busybox issues) CVE-2009-5029, CVE-2009-5064, CVE-2010-0830 and CVE-2011-1089 (glibc issues) CVE-2011-1083, CVE-2011-3638, CVE-2011-4086, CVE-2011-4127 and CVE-2012-0028 (kernel issues) CVE-2011-1526 (krb5 issue) CVE-2011-4347 (kvm issue) CVE-2010-4008, CVE-2011-0216, CVE-2011-2834, CVE-2011-3905, CVE-2011-3919 and CVE-2011-1944 (libxml2 issues) CVE-2011-1749 (nfs-utils issue) CVE-2011-4108 (openssl issue) CVE-2011-0010 (sudo issue) CVE-2011-1675 and CVE-2011-1677 (util-linux issues) CVE-2010-0424 (vixie-cron issue) This updated rhev-hypervisor5 package fixes various bugs. Documentation of these changes will be available shortly in the Technical Notes document : https://docs.redhat.com/docs/en-US/ Red_Hat_Enterprise_Virtualization_for_Servers/2.2/html/Technical_Notes / index.html Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues.
    last seen 2019-02-21
    modified 2018-12-20
    plugin id 79283
    published 2014-11-17
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79283
    title RHEL 5 : rhev-hypervisor5 (RHSA-2012:0168)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2011-9109.NASL
    description This update corrects a potential failure to properly set the effective group ID in the GSSAPI-capable FTP server (MITKRB5-SA-2011-005, CVE-2011-1526). Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-20
    plugin id 55596
    published 2011-07-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=55596
    title Fedora 14 : krb5-appl-1.0.1-4.fc14 (2011-9109)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_KRB5-7899.NASL
    description This update of krb5 fixes two security issues. - A remote code execution in the kerberized telnet daemon was fixed. (This only affects the ktelnetd from the krb5-appl RPM, not the regular telnetd supplied by SUSE.). (CVE-2011-4862) - / MITKRB5-SA-2011-005: Fixed krb5 ftpd unauthorized file access problems. (CVE-2011-1526)
    last seen 2019-02-21
    modified 2018-11-05
    plugin id 57431
    published 2012-01-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=57431
    title SuSE 10 Security Update : Kerberos 5 (ZYPP Patch Number 7899)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201201-14.NASL
    description The remote host is affected by the vulnerability described in GLSA-201201-14 (MIT Kerberos 5 Applications: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in MIT Kerberos 5 Applications: An error in the FTP daemon prevents it from dropping its initial effective group identifier (CVE-2011-1526). A boundary error in the telnet daemon and client could cause a buffer overflow (CVE-2011-4862). Impact : An unauthenticated remote attacker may be able to execute arbitrary code with the privileges of the user running the telnet daemon or client. Furthermore, an authenticated remote attacker may be able to read or write files owned by the same group as the effective group of the FTP daemon. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-11-05
    plugin id 57656
    published 2012-01-24
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=57656
    title GLSA-201201-14 : MIT Kerberos 5 Applications: Multiple vulnerabilities
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2011-0920.NASL
    description From Red Hat Security Advisory 2011:0920 : Updated krb5-appl packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and rlogin clients and servers. While these have been replaced by tools such as OpenSSH in most environments, they remain in use in others. It was found that gssftp, a Kerberos-aware FTP server, did not properly drop privileges. A remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526) Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter. All krb5-appl users should upgrade to these updated packages, which contain a backported patch to correct this issue.
    last seen 2019-02-21
    modified 2018-08-13
    plugin id 68302
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68302
    title Oracle Linux 6 : krb5-appl (ELSA-2011-0920)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2012-0306.NASL
    description Updated krb5 packages that fix one security issue and various bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). It was found that ftpd, a Kerberos-aware FTP server, did not properly drop privileges. On Red Hat Enterprise Linux 5, the ftpd daemon did not check for the potential failure of the effective group ID change system call. If the group ID change failed, a remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526) Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter. This update also fixes the following bugs : * Due to a mistake in the Kerberos libraries, a client could fail to contact a Key Distribution Center (KDC) or terminate unexpectedly if the client had already more than 1024 file descriptors in use. This update backports modifications to the Kerberos libraries and the libraries use the poll() function instead of the select() function, as poll() does not have this limitation. (BZ#701444) * The KDC failed to release memory when processing a TGS (ticket-granting server) request from a client if the client request included an authenticator with a subkey. As a result, the KDC consumed an excessive amount of memory. With this update, the code releasing the memory has been added and the problem no longer occurs. (BZ#708516) * Under certain circumstances, if services requiring Kerberos authentication sent two authentication requests to the authenticating server, the second authentication request was flagged as a replay attack. As a result, the second authentication attempt was denied. This update applies an upstream patch that fixes this bug. (BZ#713500) * Previously, if Kerberos credentials had expired, the klist command could terminate unexpectedly with a segmentation fault when invoked with the -s option. This happened when klist encountered and failed to process an entry with no realm name while scanning the credential cache. With this update, the underlying code has been modified and the command handles such entries correctly. (BZ#729067) * Due to a regression, multi-line FTP macros terminated prematurely with a segmentation fault. This occurred because the previously-added patch failed to properly support multi-line macros. This update restores the support for multi-line macros and the problem no longer occurs. (BZ#735363, BZ#736132) All users of krb5 are advised to upgrade to these updated packages, which resolve these issues.
    last seen 2019-02-21
    modified 2018-11-26
    plugin id 58060
    published 2012-02-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=58060
    title RHEL 5 : krb5 (RHSA-2012:0306)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_KRB5-111229.NASL
    description This update of krb5 fixes two security issues. - A remote code execution in the kerberized telnet daemon was fixed. (This only affects the ktelnetd from the krb5-appl RPM, not the regular telnetd supplied by SUSE.). (CVE-2011-4862) - / MITKRB5-SA-2011-005: Fixed krb5 ftpd unauthorized file access problems. (CVE-2011-1526)
    last seen 2019-02-21
    modified 2018-11-05
    plugin id 57430
    published 2012-01-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=57430
    title SuSE 11.1 Security Update : Kerberos 5 (SAT Patch Number 5594)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-2283.NASL
    description Tim Zingelmann discovered that due an incorrect configure script the kerborised FTP server failed to set the effective GID correctly, resulting in privilege escalation. The oldstable distribution (lenny) is not affected.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 55673
    published 2011-07-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=55673
    title Debian DSA-2283-1 : krb5-appl - programming error
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20120221_KRB5_ON_SL5_X.NASL
    description Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third party, the Key Distribution Center (KDC). It was found that ftpd, a Kerberos-aware FTP server, did not properly drop privileges. On Scientific Linux 5, the ftpd daemon did not check for the potential failure of the effective group ID change system call. If the group ID change failed, a remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526) This update also fixes the following bugs : - Due to a mistake in the Kerberos libraries, a client could fail to contact a Key Distribution Center (KDC) or terminate unexpectedly if the client had already more than 1024 file descriptors in use. This update backports modifications to the Kerberos libraries and the libraries use the poll() function instead of the select() function, as poll() does not have this limitation. - The KDC failed to release memory when processing a TGS (ticket-granting server) request from a client if the client request included an authenticator with a subkey. As a result, the KDC consumed an excessive amount of memory. With this update, the code releasing the memory has been added and the problem no longer occurs. - Under certain circumstances, if services requiring Kerberos authentication sent two authentication requests to the authenticating server, the second authentication request was flagged as a replay attack. As a result, the second authentication attempt was denied. This update applies an upstream patch that fixes this bug. - Previously, if Kerberos credentials had expired, the klist command could terminate unexpectedly with a segmentation fault when invoked with the -s option. This happened when klist encountered and failed to process an entry with no realm name while scanning the credential cache. With this update, the underlying code has been modified and the command handles such entries correctly. - Due to a regression, multi-line FTP macros terminated prematurely with a segmentation fault. This occurred because the previously-added patch failed to properly support multi-line macros. This update restores the support for multi-line macros and the problem no longer occurs. All users of krb5 are advised to upgrade to these updated packages, which resolve these issues.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 61266
    published 2012-08-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61266
    title Scientific Linux Security Update : krb5 on SL5.x i386/x86_64
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_4_KRB5-111019.NASL
    description The following issues have been fixed : - CVE-2011-1528: In releases krb5-1.8 and later, the KDC can crash due to an assertion failure. - CVE-2011-1529: In releases krb5-1.8 and later, the KDC can crash due to a NULL pointer dereference. Both bugs could be triggered by unauthenticated remote attackers. Additionally CVE-2011-1526 was fixed that allowed authenticated users to access files via krb5 ftpd they should not have access to.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 75885
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=75885
    title openSUSE Security Update : krb5 (openSUSE-SU-2011:1169-1)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_3_KRB5-APPL-111229.NASL
    description This update of krb5 applications fixes two security issues. CVE-2011-4862: A remote code execution in the kerberized telnet daemon was fixed. (This only affects the ktelnetd from the krb5-appl RPM, not the regular telnetd supplied by SUSE.) CVE-2011-1526 / MITKRB5-SA-2011-005: Fixed krb5 ftpd unauthorized file access problems.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 75564
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=75564
    title openSUSE Security Update : krb5-appl (openSUSE-SU-2012:0019-1)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_4_KRB5-APPL-111229.NASL
    description This update of krb5 applications fixes two security issues. CVE-2011-4862: A remote code execution in the kerberized telnet daemon was fixed. (This only affects the ktelnetd from the krb5-appl RPM, not the regular telnetd supplied by SUSE.) CVE-2011-1526 / MITKRB5-SA-2011-005: Fixed krb5 ftpd unauthorized file access problems.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 75886
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=75886
    title openSUSE Security Update : krb5-appl (openSUSE-SU-2012:0019-1)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20110705_KRB5_APPL_ON_SL6_X.NASL
    description The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and rlogin clients and servers. While these have been replaced by tools such as OpenSSH in most environments, they remain in use in others. It was found that gssftp, a Kerberos-aware FTP server, did not properly drop privileges. A remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526)
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 61079
    published 2012-08-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61079
    title Scientific Linux Security Update : krb5-appl on SL6.x i386/x86_64
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_3_KRB5-111019.NASL
    description The following issues have been fixed : - CVE-2011-1528: In releases krb5-1.8 and later, the KDC can crash due to an assertion failure. - CVE-2011-1529: In releases krb5-1.8 and later, the KDC can crash due to a NULL pointer dereference. Both bugs could be triggered by unauthenticated remote attackers. Additionally CVE-2011-1526 was fixed that allowed authenticated users to access files via krb5 ftpd they should not have access to.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 75563
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=75563
    title openSUSE Security Update : krb5 (openSUSE-SU-2011:1169-1)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2012-0306.NASL
    description From Red Hat Security Advisory 2012:0306 : Updated krb5 packages that fix one security issue and various bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). It was found that ftpd, a Kerberos-aware FTP server, did not properly drop privileges. On Red Hat Enterprise Linux 5, the ftpd daemon did not check for the potential failure of the effective group ID change system call. If the group ID change failed, a remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526) Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter. This update also fixes the following bugs : * Due to a mistake in the Kerberos libraries, a client could fail to contact a Key Distribution Center (KDC) or terminate unexpectedly if the client had already more than 1024 file descriptors in use. This update backports modifications to the Kerberos libraries and the libraries use the poll() function instead of the select() function, as poll() does not have this limitation. (BZ#701444) * The KDC failed to release memory when processing a TGS (ticket-granting server) request from a client if the client request included an authenticator with a subkey. As a result, the KDC consumed an excessive amount of memory. With this update, the code releasing the memory has been added and the problem no longer occurs. (BZ#708516) * Under certain circumstances, if services requiring Kerberos authentication sent two authentication requests to the authenticating server, the second authentication request was flagged as a replay attack. As a result, the second authentication attempt was denied. This update applies an upstream patch that fixes this bug. (BZ#713500) * Previously, if Kerberos credentials had expired, the klist command could terminate unexpectedly with a segmentation fault when invoked with the -s option. This happened when klist encountered and failed to process an entry with no realm name while scanning the credential cache. With this update, the underlying code has been modified and the command handles such entries correctly. (BZ#729067) * Due to a regression, multi-line FTP macros terminated prematurely with a segmentation fault. This occurred because the previously-added patch failed to properly support multi-line macros. This update restores the support for multi-line macros and the problem no longer occurs. (BZ#735363, BZ#736132) All users of krb5 are advised to upgrade to these updated packages, which resolve these issues.
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 68477
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68477
    title Oracle Linux 5 : krb5 (ELSA-2012-0306)
  • NASL family Mandriva Local Security Checks
    NASL id MANDRIVA_MDVSA-2011-117.NASL
    description A vulnerability was discovered and corrected in krb5-appl : ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script (CVE-2011-1526). The updated packages have been patched to correct this issue.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 55665
    published 2011-07-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=55665
    title Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:117)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2011-9080.NASL
    description This update corrects a potential failure to properly set the effective group ID in the GSSAPI-capable FTP server (MITKRB5-SA-2011-005, CVE-2011-1526). Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-20
    plugin id 55595
    published 2011-07-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=55595
    title Fedora 15 : krb5-appl-1.0.1-7.fc15 (2011-9080)
redhat via4
advisories
  • bugzilla
    id 711419
    title CVE-2011-1526 krb5, krb5-appl: ftpd incorrect group privilege dropping (MITKRB5-SA-2011-005)
    oval
    AND
    • OR
      • comment Red Hat Enterprise Linux 6 Client is installed
        oval oval:com.redhat.rhba:tst:20111656001
      • comment Red Hat Enterprise Linux 6 Server is installed
        oval oval:com.redhat.rhba:tst:20111656002
      • comment Red Hat Enterprise Linux 6 Workstation is installed
        oval oval:com.redhat.rhba:tst:20111656003
      • comment Red Hat Enterprise Linux 6 ComputeNode is installed
        oval oval:com.redhat.rhba:tst:20111656004
    • OR
      • AND
        • comment krb5-appl-clients is earlier than 0:1.0.1-2.el6_1.1
          oval oval:com.redhat.rhsa:tst:20110920007
        • comment krb5-appl-clients is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110920008
      • AND
        • comment krb5-appl-servers is earlier than 0:1.0.1-2.el6_1.1
          oval oval:com.redhat.rhsa:tst:20110920005
        • comment krb5-appl-servers is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110920006
    rhsa
    id RHSA-2011:0920
    released 2011-07-05
    severity Important
    title RHSA-2011:0920: krb5-appl security update (Important)
  • bugzilla
    id 750823
    title Newly introduced defect into krb5
    oval
    AND
    • comment Red Hat Enterprise Linux 5 is installed
      oval oval:com.redhat.rhba:tst:20070331001
    • OR
      • AND
        • comment krb5-devel is earlier than 0:1.6.1-70.el5
          oval oval:com.redhat.rhsa:tst:20120306002
        • comment krb5-devel is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20070095021
      • AND
        • comment krb5-libs is earlier than 0:1.6.1-70.el5
          oval oval:com.redhat.rhsa:tst:20120306004
        • comment krb5-libs is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20070095019
      • AND
        • comment krb5-server is earlier than 0:1.6.1-70.el5
          oval oval:com.redhat.rhsa:tst:20120306008
        • comment krb5-server is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20070095023
      • AND
        • comment krb5-server-ldap is earlier than 0:1.6.1-70.el5
          oval oval:com.redhat.rhsa:tst:20120306010
        • comment krb5-server-ldap is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20110199011
      • AND
        • comment krb5-workstation is earlier than 0:1.6.1-70.el5
          oval oval:com.redhat.rhsa:tst:20120306006
        • comment krb5-workstation is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20070095017
    rhsa
    id RHSA-2012:0306
    released 2012-02-21
    severity Low
    title RHSA-2012:0306: krb5 security and bug fix update (Low)
rpms
  • krb5-appl-clients-0:1.0.1-2.el6_1.1
  • krb5-appl-servers-0:1.0.1-2.el6_1.1
  • krb5-devel-0:1.6.1-70.el5
  • krb5-libs-0:1.6.1-70.el5
  • krb5-server-0:1.6.1-70.el5
  • krb5-server-ldap-0:1.6.1-70.el5
  • krb5-workstation-0:1.6.1-70.el5
refmap via4
bid 48571
bugtraq 20110705 MITKRB5-SA-2011-005 FTP daemon fails to set effective group ID [CVE-2011-1526]
confirm
debian DSA-2283
fedora
  • FEDORA-2011-9080
  • FEDORA-2011-9109
mandriva MDVSA-2011:117
osvdb 73617
secunia
  • 45145
  • 45157
  • 48101
sreason 8301
suse
  • SUSE-SU-2012:0010
  • SUSE-SU-2012:0018
  • SUSE-SU-2012:0042
  • SUSE-SU-2012:0050
  • openSUSE-SU-2011:1169
  • openSUSE-SU-2012:0019
  • openSUSE-SU-2012:0051
xf kerberos-krb5appl-priv-esc(68398)
Last major update 18-01-2012 - 22:56
Published 11-07-2011 - 16:55
Last modified 09-10-2018 - 15:31
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