ID CVE-2015-5277
Summary The get_contents function in nss_files/files-XXX.c in the Name Service Switch (NSS) in GNU C Library (aka glibc or libc6) before 2.20 might allow local users to cause a denial of service (heap corruption) or gain privileges via a long line in the NSS files database.
References
Vulnerable Configurations
  • RedHat Enterprise Linux Desktop 7.0
    cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
  • RedHat Enterprise Linux Server 7.0
    cpe:2.3:o:redhat:enterprise_linux_server:7.0
  • RedHat Enterprise Linux HPC Node 7.0
    cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0
  • RedHat Enterprise Linux Workstation 7.0
    cpe:2.3:o:redhat:enterprise_linux_workstation:7.0
  • GNU glibc 2.19
    cpe:2.3:a:gnu:glibc:2.19
  • Canonical Ubuntu Linux 15.10
    cpe:2.3:o:canonical:ubuntu_linux:15.10
  • Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)
    cpe:2.3:o:canonical:ubuntu_linux:14.04:-:-:-:lts
  • Canonical Ubuntu Linux 12.04 LTS
    cpe:2.3:o:canonical:ubuntu_linux:12.04:-:-:-:lts
CVSS
Base: 7.2 (as of 09-06-2016 - 12:49)
Impact:
Exploitability:
CWE CWE-119
CAPEC
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
nessus via4
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201702-11.NASL
    description The remote host is affected by the vulnerability described in GLSA-201702-11 (GNU C Library: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in the GNU C Library. Please review the CVE identifiers referenced below for details. Impact : A context-dependent attacker could possibly execute arbitrary code with the privileges of the process, disclose sensitive information, or cause a Denial of Service condition via multiple vectors. Workaround : There is no known workaround at this time.
    last seen 2018-09-01
    modified 2017-02-21
    plugin id 97254
    published 2017-02-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=97254
    title GLSA-201702-11 : GNU C Library: Multiple vulnerabilities
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2015-2172.NASL
    description From Red Hat Security Advisory 2015:2172 : Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 7. Red Hat Product Security 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 glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents) in certain cases. A local attacker could potentially use this flaw to escalate their privileges. (CVE-2015-5277) This issue was discovered by Sumit Bose and Lukas Slebodnik of Red Hat. All glibc users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.
    last seen 2018-09-02
    modified 2018-07-24
    plugin id 87091
    published 2015-11-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87091
    title Oracle Linux 7 : glibc (ELSA-2015-2172)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20151119_GLIBC_ON_SL7_X_IMPORTANT.NASL
    description It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents) in certain cases. A local attacker could potentially use this flaw to escalate their privileges. (CVE-2015-5277)
    last seen 2018-09-02
    modified 2015-12-29
    plugin id 87638
    published 2015-12-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87638
    title Scientific Linux Security Update : glibc on SL7.x x86_64_important
  • NASL family Amazon Linux Local Security Checks
    NASL id ALA_ALAS-2015-617.NASL
    description A buffer overflow flaw was found in the way glibc's gethostbyname_r() and other related functions computed the size of a buffer when passed a misaligned buffer as input. An attacker able to make an application call any of these functions with a misaligned buffer could use this flaw to crash the application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1781) It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents). A local attacker could potentially use this flaw to execute arbitrary code on the system. (CVE-2015-5277) It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data. (CVE-2013-7423) A stack overflow flaw was found in glibc's swscanf() function. An attacker able to make an application call the swscanf() function could use this flaw to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1473) A heap-based buffer overflow flaw was found in glibc's swscanf() function. An attacker able to make an application call the swscanf() function could use this flaw to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1472)
    last seen 2018-09-01
    modified 2018-04-18
    plugin id 87343
    published 2015-12-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87343
    title Amazon Linux AMI : glibc (ALAS-2015-617)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2015-2172.NASL
    description Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 7. Red Hat Product Security 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 glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents) in certain cases. A local attacker could potentially use this flaw to escalate their privileges. (CVE-2015-5277) This issue was discovered by Sumit Bose and Lukas Slebodnik of Red Hat. All glibc users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.
    last seen 2018-11-11
    modified 2018-11-10
    plugin id 87139
    published 2015-12-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87139
    title CentOS 7 : glibc (CESA-2015:2172)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-2985-1.NASL
    description Martin Carpenter discovered that pt_chown in the GNU C Library did not properly check permissions for tty files. A local attacker could use this to gain administrative privileges or expose sensitive information. (CVE-2013-2207, CVE-2016-2856) Robin Hack discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not properly manage its file descriptors. An attacker could use this to cause a denial of service (infinite loop). (CVE-2014-8121) Joseph Myers discovered that the GNU C Library did not properly handle long arguments to functions returning a representation of Not a Number (NaN). An attacker could use this to cause a denial of service (stack exhaustion leading to an application crash) or possibly execute arbitrary code. (CVE-2014-9761) Arjun Shankar discovered that in certain situations the nss_dns code in the GNU C Library did not properly account buffer sizes when passed an unaligned buffer. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2015-1781) Sumit Bose and Lukas Slebodnik discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not handle long lines in the files databases correctly. A local attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-5277) Adam Nielsen discovered that the strftime function in the GNU C Library did not properly handle out-of-range argument data. An attacker could use this to cause a denial of service (application crash) or possibly expose sensitive information. (CVE-2015-8776) Hector Marco and Ismael Ripoll discovered that the GNU C Library allowed the pointer-guarding protection mechanism to be disabled by honoring the LD_POINTER_GUARD environment variable across privilege boundaries. A local attacker could use this to exploit an existing vulnerability more easily. (CVE-2015-8777) Szabolcs Nagy discovered that the hcreate functions in the GNU C Library did not properly check its size argument, leading to an integer overflow. An attacker could use to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-8778) Maksymilian Arciemowicz discovered a stack-based buffer overflow in the catopen function in the GNU C Library when handling long catalog names. An attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-8779) Florian Weimer discovered that the getnetbyname implementation in the GNU C Library did not properly handle long names passed as arguments. An attacker could use to cause a denial of service (stack exhaustion leading to an application crash). (CVE-2016-3075). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-12-02
    modified 2018-12-01
    plugin id 91334
    published 2016-05-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91334
    title Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : eglibc, glibc vulnerabilities (USN-2985-1)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2015-2172.NASL
    description Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 7. Red Hat Product Security 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 glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents) in certain cases. A local attacker could potentially use this flaw to escalate their privileges. (CVE-2015-5277) This issue was discovered by Sumit Bose and Lukas Slebodnik of Red Hat. All glibc users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.
    last seen 2018-11-13
    modified 2018-11-10
    plugin id 86974
    published 2015-11-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=86974
    title RHEL 7 : glibc (RHSA-2015:2172)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2015-2589.NASL
    description Updated glibc packages that fix multiple security issues are now available for Red Hat Enterprise Linux 7.1 Extended Update Support. Red Hat Product Security 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 glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents). A local attacker could potentially use this flaw to execute arbitrary code on the system. (CVE-2015-5277) It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data. (CVE-2013-7423) A buffer overflow flaw was found in the way glibc's gethostbyname_r() and other related functions computed the size of a buffer when passed a misaligned buffer as input. An attacker able to make an application call any of these functions with a misaligned buffer could use this flaw to crash the application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1781) A heap-based buffer overflow flaw and a stack overflow flaw were found in glibc's swscanf() function. An attacker able to make an application call the swscanf() function could use these flaws to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1472, CVE-2015-1473) The CVE-2015-5277 issue was discovered by Sumit Bose and Lukas Slebodnik of Red Hat, and the CVE-2015-1781 issue was discovered by Arjun Shankar of Red Hat. All glibc users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
    last seen 2018-11-13
    modified 2018-11-10
    plugin id 88573
    published 2016-02-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=88573
    title RHEL 7 : glibc (RHSA-2015:2589)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-2985-2.NASL
    description USN-2985-1 fixed vulnerabilities in the GNU C Library. The fix for CVE-2014-9761 introduced a regression which affected applications that use the libm library but were not fully restarted after the upgrade. This update removes the fix for CVE-2014-9761 and a future update will be provided to address this issue. We apologize for the inconvenience. Martin Carpenter discovered that pt_chown in the GNU C Library did not properly check permissions for tty files. A local attacker could use this to gain administrative privileges or expose sensitive information. (CVE-2013-2207, CVE-2016-2856) Robin Hack discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not properly manage its file descriptors. An attacker could use this to cause a denial of service (infinite loop). (CVE-2014-8121) Joseph Myers discovered that the GNU C Library did not properly handle long arguments to functions returning a representation of Not a Number (NaN). An attacker could use this to cause a denial of service (stack exhaustion leading to an application crash) or possibly execute arbitrary code. (CVE-2014-9761) Arjun Shankar discovered that in certain situations the nss_dns code in the GNU C Library did not properly account buffer sizes when passed an unaligned buffer. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2015-1781) Sumit Bose and Lukas Slebodnik discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not handle long lines in the files databases correctly. A local attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-5277) Adam Nielsen discovered that the strftime function in the GNU C Library did not properly handle out-of-range argument data. An attacker could use this to cause a denial of service (application crash) or possibly expose sensitive information. (CVE-2015-8776) Hector Marco and Ismael Ripoll discovered that the GNU C Library allowed the pointer-guarding protection mechanism to be disabled by honoring the LD_POINTER_GUARD environment variable across privilege boundaries. A local attacker could use this to exploit an existing vulnerability more easily. (CVE-2015-8777) Szabolcs Nagy discovered that the hcreate functions in the GNU C Library did not properly check its size argument, leading to an integer overflow. An attacker could use to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-8778) Maksymilian Arciemowicz discovered a stack-based buffer overflow in the catopen function in the GNU C Library when handling long catalog names. An attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-8779) Florian Weimer discovered that the getnetbyname implementation in the GNU C Library did not properly handle long names passed as arguments. An attacker could use to cause a denial of service (stack exhaustion leading to an application crash). (CVE-2016-3075). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-12-02
    modified 2018-12-01
    plugin id 91341
    published 2016-05-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91341
    title Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : eglibc, glibc regression (USN-2985-2)
redhat via4
advisories
bugzilla
id 1262914
title CVE-2015-5277 glibc: data corruption while reading the NSS files database
oval
AND
  • OR
    • comment Red Hat Enterprise Linux 7 Client is installed
      oval oval:com.redhat.rhsa:tst:20140675001
    • comment Red Hat Enterprise Linux 7 Server is installed
      oval oval:com.redhat.rhsa:tst:20140675002
    • comment Red Hat Enterprise Linux 7 Workstation is installed
      oval oval:com.redhat.rhsa:tst:20140675003
    • comment Red Hat Enterprise Linux 7 ComputeNode is installed
      oval oval:com.redhat.rhsa:tst:20140675004
  • OR
    • AND
      • comment glibc is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172011
      • comment glibc is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872006
    • AND
      • comment glibc-common is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172017
      • comment glibc-common is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872012
    • AND
      • comment glibc-devel is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172015
      • comment glibc-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872018
    • AND
      • comment glibc-headers is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172005
      • comment glibc-headers is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872010
    • AND
      • comment glibc-static is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172009
      • comment glibc-static is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872008
    • AND
      • comment glibc-utils is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172013
      • comment glibc-utils is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872014
    • AND
      • comment nscd is earlier than 0:2.17-106.el7_2.1
        oval oval:com.redhat.rhsa:tst:20152172007
      • comment nscd is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20100872016
rhsa
id RHSA-2015:2172
released 2015-11-19
severity Important
title RHSA-2015:2172: glibc security update (Important)
rpms
  • glibc-0:2.17-106.el7_2.1
  • glibc-common-0:2.17-106.el7_2.1
  • glibc-devel-0:2.17-106.el7_2.1
  • glibc-headers-0:2.17-106.el7_2.1
  • glibc-static-0:2.17-106.el7_2.1
  • glibc-utils-0:2.17-106.el7_2.1
  • nscd-0:2.17-106.el7_2.1
refmap via4
bid 78092
confirm
gentoo GLSA-201702-11
mlist [libc-alpha] 20140909 The GNU C Library version 2.20 is now available
sectrack 1034196
ubuntu
  • USN-2985-1
  • USN-2985-2
Last major update 28-11-2016 - 14:32
Published 17-12-2015 - 14:59
Last modified 30-06-2017 - 21:29
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