||ld.so in the GNU C Library (aka glibc or libc6) before 2.11.3, and 2.12.x before 2.12.2, does not properly restrict use of the LD_AUDIT environment variable to reference dynamic shared objects (DSOs) as audit objects, which allows local users to gain privileges by leveraging an unsafe DSO located in a trusted library directory, as demonstrated by libpcprofile.so.
GNU glibc 1.00
GNU glibc 1.01
GNU glibc 1.02
GNU glibc 1.03
GNU glibc 1.04
GNU glibc 1.05
GNU glibc 1.06
GNU glibc 1.07
GNU glibc 1.08
GNU glibc 1.09
GNU glibc 1.09.1
GNU glibc 2.0
GNU glibc 2.0.1
GNU glibc 2.0.2
GNU glibc 2.0.3
GNU glibc 2.0.4
GNU glibc 2.0.5
GNU glibc 2.0.6
GNU glibc 2.1
GNU glibc 2.1.1
GNU glibc 22.214.171.124
GNU glibc 2.1.2
GNU glibc 2.1.3
GNU glibc 126.96.36.199
GNU glibc 2.1.9
GNU glibc 2.2
GNU glibc 2.2.1
GNU glibc 2.2.2
GNU glibc 2.2.3
GNU glibc 2.2.4
GNU glibc 2.2.5
GNU glibc 2.3
GNU glibc 2.3.1
GNU glibc 2.3.2
GNU glibc 2.3.3
GNU glibc 2.3.4
GNU glibc 2.3.5
GNU glibc 2.3.6
GNU glibc 2.3.10
GNU glibc 2.4
GNU glibc 2.5
GNU glibc 2.5.1
GNU glibc 2.6
GNU glibc 2.6.1
GNU glibc 2.7
GNU glibc 2.8
GNU glibc 2.9
GNU glibc 2.10
GNU glibc 2.10.1
GNU glibc 2.10.2
GNU glibc 2.11
GNU glibc 2.11.1
GNU glibc 2.11.2
GNU glibc 2.12.0
GNU glibc 2.12.1
|Base: ||7.2 (as of 10-01-2011 - 09:21)|
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 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.
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.
|description||glibc - 'LD_AUDIT' Arbitrary DSO Load Privilege Escalation (Metasploit). CVE-2010-3847,CVE-2010-3856. Local exploit for Linux platform. Tags: Metasploit Fram... |
|last seen||2018-02-12 |
|title||glibc - 'LD_AUDIT' Arbitrary DSO Load Privilege Escalation (Metasploit) |
|description||GNU C library dynamic linker LD_AUDIT arbitrary DSO load Vulnerability. CVE-2010-3856. Local exploit for linux platform |
|last seen||2016-02-01 |
|reporter||Tavis Ormandy |
|title||GNU C library dynamic linker LD_AUDIT - Arbitrary DSO Load Vulnerability Local Root |
|description||glibc LD_AUDIT arbitrary DSO - Load Privilege Escalation. CVE-2010-3856. Local exploit for linux platform |
|last seen||2016-02-02 |
|title||glibc LD_AUDIT arbitrary DSO - Load Privilege Escalation |
|description||This module attempts to gain root privileges on Linux systems by abusing a vulnerability in the GNU C Library (glibc) dynamic linker. glibc ld.so in versions before 2.11.3, and 2.12.x before 2.12.2 does not properly restrict use of the LD_AUDIT environment variable when loading setuid executables. This allows loading arbitrary shared objects from the trusted library search path with the privileges of the suid user. This module uses LD_AUDIT to load the libpcprofile.so shared object, distributed with some versions of glibc, and leverages arbitrary file creation functionality in the library constructor to write a root-owned world-writable file to a system trusted search path (usually /lib). The file is then overwritten with a shared object then loaded with LD_AUDIT resulting in arbitrary code execution. This module has been tested successfully on glibc version 2.11.1 on Ubuntu 10.04 x86_64 and version 2.7 on Debian 5.0.4 i386. RHEL 5 is reportedly affected, but untested. Some glibc distributions do not contain the libpcprofile.so library required for successful exploitation. |
|last seen||2019-03-17 |
|title||glibc LD_AUDIT Arbitrary DSO Load Privilege Escalation |
|NASL family||Red Hat Local Security Checks |
|NASL id||REDHAT-RHSA-2010-0793.NASL |
|description||Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 5.
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 glibc packages contain the standard C libraries used by multiple programs on the system. These packages contain the standard C and the standard math libraries. Without these two libraries, a Linux system cannot function properly.
It was discovered that the glibc dynamic linker/loader did not perform sufficient safety checks when loading dynamic shared objects (DSOs) to provide callbacks for its auditing API during the execution of privileged programs. A local attacker could use this flaw to escalate their privileges via a carefully-chosen system DSO library containing unsafe constructors. (CVE-2010-3856)
Red Hat would like to thank Ben Hawkes and Tavis Ormandy for reporting this issue.
All users should upgrade to these updated packages, which contain a backported patch to correct this issue. |
|last seen||2019-02-21 |
|plugin id||50341 |
|title||RHEL 5 : glibc (RHSA-2010:0793) |
|NASL family||Fedora Local Security Checks |
|NASL id||FEDORA_2010-16851.NASL |
|description||Require suid bit on audit objects in privileged programs (CVE-2010-3856)
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 |
|plugin id||50401 |
|title||Fedora 14 : glibc-2.12.90-18 (2010-16851) |
|NASL family||Ubuntu Local Security Checks |
|NASL id||UBUNTU_USN-1009-1.NASL |
|description||Tavis Ormandy discovered multiple flaws in the GNU C Library's handling of the LD_AUDIT environment variable when running a privileged binary. A local attacker could exploit this to gain root privileges. (CVE-2010-3847, CVE-2010-3856).
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||2019-02-21 |
|plugin id||50318 |
|title||Ubuntu 8.04 LTS / 9.04 / 9.10 / 10.04 LTS / 10.10 : glibc, eglibc vulnerabilities (USN-1009-1) |
|NASL family||OracleVM Local Security Checks |
|NASL id||ORACLEVM_OVMSA-2015-0023.NASL |
|description||The remote OracleVM system is missing necessary patches to address critical security updates :
- Switch to use malloc when the input line is too long [Orabug 19951108]
- Use a /sys/devices/system/cpu/online for
_SC_NPROCESSORS_ONLN implementation [Orabug 17642251] (Joe Jin)
- Fix parsing of numeric hosts in gethostbyname_r (CVE-2015-0235, #1183532).
- Remove gconv transliteration loadable modules support (CVE-2014-5119, - _nl_find_locale: Improve handling of crafted locale names (CVE-2014-0475,
- Fix patch for integer overflows in *valloc and memalign.
- Fix return code when starting an already started nscd daemon (#979413).
- Fix getnameinfo for many PTR record queries (#1020486).
- Return EINVAL error for negative sizees to getgroups (#995207).
- Fix integer overflows in *valloc and memalign.
- Add support for newer L3 caches on x86-64 and correctly count the number of hardware threads sharing a cacheline (#1003420).
- Revert incomplete fix for bug #758193.
- Fix _nl_find_msg malloc failure case, and callers (#957089).
- Test on init_fct, not result->__init_fct, after demangling (#816647).
- Don't handle ttl == 0 specially (#929035).
- Fix multibyte character processing crash in regexp (CVE-2013-0242, #951132)
- Fix getaddrinfo stack overflow resulting in application crash (CVE-2013-1914, #951132)
- Add missing patch to avoid use after free (#816647)
- Fix race in initgroups compat_call (#706571)
- Fix return value from getaddrinfo when servers are down.
- Fix fseek on wide character streams. Sync's seeking code with RHEL 6 (#835828)
- Call feraiseexcept only if exceptions are not masked (#861871).
- Always demangle function before checking for NULL value.
- Do not fail in ttyname if /proc is not available (#851450).
- Fix errno for various overflow situations in vfprintf.
Add missing overflow checks. (#857387)
- Handle failure of _nl_explode_name in all cases (#848481)
- Define the default fuzz factor to 2 to make it easier to manipulate RHEL 5 RPMs on RHEL 6 and newer systems.
- Fix race in intl/* testsuite (#849202)
- Fix out of bounds array access in strto* exposed by 847930 patch.
- Really fix POWER4 strncmp crash (#766832).
- Fix integer overflow leading to buffer overflow in strto* (#847930)
- Fix race in msort/qsort (#843672)
- Fix regression due to 797096 changes (#845952)
- Do not use PT_IEEE_IP ptrace calls (#839572)
- Update ULPs (#837852)
- Fix various transcendentals in non-default rounding modes (#837852)
- Fix unbound alloca in vfprintf (#826947)
- Fix iconv segfault if the invalid multibyte character 0xffff is input when converting from IBM930. (#823905)
- Fix fnmatch when '*' wildcard is applied on a file name containing multibyte chars. (#819430)
- Fix unbound allocas use in glob_in_dir, getaddrinfo and others. (#797096)
- Fix segfault when running ld.so --verify on some DSO's in current working directory. (#808342)
- Incorrect initialization order for dynamic loader (#813348)
- Fix return code when stopping already stopped nscd daemon (#678227)
- Remove MAP_32BIT for pthread stack mappings, use MAP_STACK instead (#641094)
- Fix setuid vs sighandler_setxid race (#769852)
- Fix access after end of search string in regex matcher (#757887)
- Fix POWER4 strncmp crash (#766832)
- Fix SC_*CACHE detection for X5670 cpus (#692182)
- Fix parsing IPV6 entries in /etc/resolv.conf (#703239)
- Fix double-free in nss_nis code (#500767)
- Add kernel VDSO support for s390x (#795896)
- Fix race in malloc arena creation and make implementation match documented behaviour (#800240)
- Do not override TTL of CNAME with TTL of its alias (#808014)
- Fix short month names in fi_FI locale #(657266).
- Fix nscd crash for group with large number of members (#788989)
- Fix Slovakia currency (#799853)
- Fix getent malloc failure check (#806403)
- Fix short month names in zh_CN locale (#657588)
- Fix decimal point symbol for Portuguese currency (#710216)
- Avoid integer overflow in sbrk (#767358)
- Avoid race between [,__de]allocate_stack and
__reclaim_stacks during fork (#738665)
- Fix race between IO_flush_all_lockp & pthread_cancel (#751748)
- Fix memory leak in NIS endgrent (#809325)
- Allow getaddr to accept SCTP socket types in hints (#765710)
- Fix errno handling in vfprintf (#794814)
- Filter out when building file lists (#784646).
- Avoid 'nargs' integer overflow which could be used to bypass FORTIFY_SOURCE (#794814)
- Fix currency_symbol for uk_UA (#639000)
- Correct test for detecting cycle during topo sort (#729661)
- Check values from TZ file header (#767688)
- Complete the numeric settings fix (#675259)
- Complete the change for error codes from pthread_create (#707998)
- Truncate time values in Linux futimes when falling back to utime (#758252)
- Update systemtaparches
- Add rules to build libresolv with SSP flags (#756453)
- Fix PLT reference
- Workaround misconfigured system (#702300)
- Update systemtaparches
- Correct cycle detection during dependency sorting (#729661)
- Add gdb hooks (#711924)
- Fix alloca accounting in strxfm and strcoll (#585433)
- Correct cycle detection during dependency sorting (#729661)
- ldd: never run file directly (#531160)
- Implement greedy matching of weekday and month names (#657570)
- Fix incorrect numeric settings (#675259)
- Implement new mode for NIS passwd.adjunct.byname table (#678318)
- Query NIS domain only when needed (#703345)
- Count total processors using sysfs (#706894)
- Translate clone error if necessary (#707998)
- Workaround kernel clobbering robust list (#711531)
- Use correct type when casting d_tag (#599056, CVE-2010-0830)
- Report write error in addmnt even for cached streams (#688980, CVE-2011-1089)
- Don't underestimate length of DST substitution (#694655)
- Don't allocate executable stack when it cannot be allocated in the first 4G (#448011)
- Initialize resolver state in nscd (#676039)
- No cancel signal in unsafe places (#684808)
- Check size of pattern in wide character representation in fnmatch (#681054)
- Avoid too much stack use in fnmatch (#681054, CVE-2011-1071)
- Properly quote output of locale (#625893, CVE-2011-1095)
- Don't leave empty element in rpath when skipping the first element, ignore rpath elements containing non-isolated use of $ORIGIN when privileged (#667974, CVE-2011-0536)
- Fix handling of newline in addmntent (#559579, CVE-2010-0296)
- Don't ignore $ORIGIN in libraries (#670988)
- Fix false assertion (#604796)
- Fix ordering of DSO constructors and destructors (#604796)
- Fix typo (#531576)
- Fix concurrency problem between dl_open and dl_iterate_phdr (#649956)
- Require suid bit on audit objects in privileged programs (#645678, CVE-2010-3856)
- Never expand $ORIGIN in privileged programs (#643819, CVE-2010-3847)
- Add timestamps to nscd logs (#527558)
- Fix index wraparound handling in memusage (#531576)
- Handle running out of buffer space with IPv6 mapping enabled (#533367)
- Don't deadlock in __dl_iterate_phdr while (un)loading objects (#549813)
- Avoid alloca in setenv for long strings (#559974)
- Recognize POWER7 and ISA 2.06 (#563563)
- Add support for AT_BASE_PLATFORM (#563599)
- Restore locking in free_check (#585674)
- Fix lookup of collation sequence value during regexp matching (#587360)
- Fix POWER6 memcpy/memset (#579011)
- Fix scope handling during dl_close (#593675)
- Enable -fasynchronous-unwind-tables throughout (#593047)
- Fix crash when aio thread creation fails (#566712)|
|last seen||2019-02-21 |
|plugin id||81118 |
|title||OracleVM 3.2 : glibc (OVMSA-2015-0023) (GHOST) |
|NASL family||Mandriva Local Security Checks |
|NASL id||MANDRIVA_MDVSA-2010-212.NASL |
|description||A vulnerability in the GNU C library (glibc) was discovered which could escalate the privilegies for local users (CVE-2010-3856).
Packages for 2009.0 are provided as of the Extended Maintenance Program. Please visit this link to learn more:
The updated packages have been patched to correct this issue. |
|last seen||2019-02-21 |
|plugin id||50321 |
|title||Mandriva Linux Security Advisory : glibc (MDVSA-2010:212) |
|NASL family||SuSE Local Security Checks |
|NASL id||SUSE_11_2_GLIBC-101027.NASL |
|description||This update of glibc fixes various bugs and security issues :
CVE-2010-3847: Decoding of the $ORIGIN special value in various LD_ environment variables allowed local attackers to execute code in context of e.g. setuid root programs, elevating privileges. This issue does not affect SUSE as an assertion triggers before the respective code is executed. The bug was fixed nevertheless.
CVE-2010-3856: The LD_AUDIT envir |