This collective update to the GNU Lib C library (glibc) provides the following fixes :

  - Make addmntent() return errors also for cached streams     (bnc#676178, CVE-2011-1089)

  - Fix overflows in vfprintf() (bnc#770891, CVE-2012-3406)

  - Fix incomplete results from nscd (bnc#753756)

  - Fix a deadlock in dlsym in case the symbol isn't found,     for multi-threaded programs (bnc #760216).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated glibc packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate 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 and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

It was discovered that the formatted printing functionality in glibc did not properly restrict the use of alloca(). This could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3406)

This update also fixes the following bug :

* If a file or a string was in the IBM-930 encoding, and contained the invalid multibyte character '0xffff', attempting to use iconv() (or the iconv command) to convert that file or string to another encoding, such as UTF-8, resulted in a segmentation fault. With this update, the conversion code for the IBM-930 encoding recognizes this invalid character and calls an error handler, rather than causing a segmentation fault. (BZ#837896)

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

Updated glibc packages that fix three security issues and one bug are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate 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 and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug :

* A programming error caused an internal array of nameservers to be only partially initialized when the /etc/resolv.conf file contained IPv6 nameservers. Depending on the contents of a nearby structure, this could cause certain applications to terminate unexpectedly with a segmentation fault. The programming error has been fixed, which restores proper behavior with IPv6 nameservers listed in the /etc/resolv.conf file. (BZ#837026)

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug :

  - A programming error caused an internal array of     nameservers to be only partially initialized when the     /etc/resolv.conf file contained IPv6 nameservers.
    Depending on the contents of a nearby structure, this     could cause certain applications to terminate     unexpectedly with a segmentation fault. The programming     error has been fixed, which restores proper behavior     with IPv6 nameservers listed in the /etc/resolv.conf     file.

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

It was discovered that positional arguments to the printf() family of functions were not handled properly in the GNU C Library. An attacker could possibly use this to cause a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code.
(CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

It was discovered that multiple integer overflows existed in the strtod(), strtof() and strtold() functions in the GNU C Library. An attacker could possibly use this to trigger a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code. (CVE-2012-3480).

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.

This collective update for the GNU C library (glibc) provides the following fixes :

  - Fix strtod integer/buffer overflows. (bnc#775690,     CVE-2012-3480)

  - Fix vfprintf handling of many format specifiers.
    (bnc#770891, CVE-2012-3404 / CVE-2012-3405 /     CVE-2012-3406)

  - Fix pthread_cond_timedwait stack unwinding. (bnc#750741,     bnc#777233)

  - Improve fix for dynamic library unloading. (bnc#783060)

  - Fix resolver when first query fails, but second one     succeeds. (bnc#767266)

Updated glibc packages fix security vulnerabilities :

Stephane Chazelas discovered that directory traversal issue in locale handling in glibc. glibc accepts relative paths with .. components in the LC_* and LANG variables. Together with typical OpenSSH configurations (with suitable AcceptEnv settings in sshd_config), this could conceivably be used to bypass ForceCommand restrictions (or restricted shells), assuming the attacker has sufficient level of access to a file system location on the host to create crafted locale definitions there (CVE-2014-0475).

David Reid, Glyph Lefkowitz, and Alex Gaynor discovered a bug where posix_spawn_file_actions_addopen fails to copy the path argument (glibc bz #17048) which can, in conjunction with many common memory management techniques from an application, lead to a use after free, or other vulnerabilities (CVE-2014-4043).

This update also fixes the following issues: x86: Disable x87 inline functions for SSE2 math (glibc bz #16510) malloc: Fix race in free() of fastbin chunk (glibc bz #15073)

Tavis Ormandy discovered a heap-based buffer overflow in the transliteration module loading code. As a result, an attacker who can supply a crafted destination character set argument to iconv-related character conversation functions could achieve arbitrary code execution.

This update removes support of loadable gconv transliteration modules.
Besides the security vulnerability, the module loading code had functionality defects which prevented it from working for the intended purpose (CVE-2014-5119).

Adhemerval Zanella Netto discovered out-of-bounds reads in additional code page decoding functions (IBM933, IBM935, IBM937, IBM939, IBM1364) that can be used to crash the systems, causing a denial of service conditions (CVE-2014-6040).

The function wordexp() fails to properly handle the WRDE_NOCMD flag when processing arithmetic inputs in the form of '$((... ))' where '...' can be anything valid. The backticks in the arithmetic epxression are evaluated by in a shell even if WRDE_NOCMD forbade command substitution. This allows an attacker to attempt to pass dangerous commands via constructs of the above form, and bypass the WRDE_NOCMD flag. This update fixes the issue (CVE-2014-7817).

The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not properly restrict the use of the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers (CVE-2012-3406).

The nss_dns implementation of getnetbyname could run into an infinite loop if the DNS response contained a PTR record of an unexpected format (CVE-2014-9402).

Also glibc lock elision (new feature in glibc 2.18) has been disabled as it can break glibc at runtime on newer Intel hardware (due to hardware bug)

Under certain conditions wscanf can allocate too little memory for the to-be-scanned arguments and overflow the allocated buffer (CVE-2015-1472).

The incorrect use of '__libc_use_alloca (newsize)' caused a different (and weaker) policy to be enforced which could allow a denial of service attack (CVE-2015-1473).

The remote VMware ESXi 5.1 host is affected by the following security vulnerabilities :

  - An integer overflow condition exists in the glibc     library in the __tzfile_read() function that allows a     denial of service or arbitrary code execution.
    (CVE-2009-5029)

  - An error exists in the glibc library related to modified     loaders and 'LD_TRACE_LOADED_OBJECTS' checks that allow     arbitrary code execution. This issue is disputed by the     creators of glibc. (CVE-2009-5064)

  - An integer signedness error exists in the     elf_get_dynamic_info() function in elf/dynamic-link.h     that allows arbitrary code execution. (CVE-2010-0830)

  - An error exists in the glibc library in the addmntent()     function that allows a corruption of the '/etc/mtab'     file. (CVE-2011-1089)

  - An error exists in the libxslt library in the     xsltGenerateIdFunction() function that allows the     disclosure of sensitive information. (CVE-2011-1202)

  - An off-by-one overflow condition exists in the     xmlXPtrEvalXPtrPart() function due to improper     validation of user-supplied input. An unauthenticated,     remote attacker can exploit this, via a specially     crafted XML file, to cause a denial of service condition     or the execution of arbitrary code. (CVE-2011-3102)

  - An out-of-bounds read error exists in the libxslt     library in the xsltCompilePatternInternal() function     that allows a denial of service. (CVE-2011-3970)

  - An error exists in the glibc library in the svc_run()     function that allows a denial of service.
    (CVE-2011-4609)

  - An overflow error exists in the glibc library in the     printf() function related to 'nargs' parsing that allows     arbitrary code execution. (CVE-2012-0864)

  - Multiple integer overflow conditions exist due to     improper validation of user-supplied input when handling     overly long strings. An unauthenticated, remote     attacker can exploit this, via a specially crafted XML     file, to cause a denial of service condition or the     execution of arbitrary code. (CVE-2012-2807)

  - Multiple type-confusion errors exist in the     'IS_XSLT_ELEM' macro and the xsltApplyTemplates()     function that allow a denial of service or the     disclosure of sensitive information. (CVE-2012-2825,     CVE-2012-2871)

  - A use-after-free error exists in the libxslt library in     the xsltGenerateIdFunction() function that allows a     denial of service or arbitrary code execution.
    (CVE-2012-2870)

  - Multiple format string error exist in glibc that allow     arbitrary code execution. (CVE-2012-3404, CVE-2012-3405,     CVE-2012-3406)

  - Multiple overflow errors exist in the glibc functions     strtod(), strtof(), strtold(), and strtod_l() that allow     arbitrary code execution. (CVE-2012-3480)

  - A heap-based underflow condition exists in the bundled     libxml2 library due to incorrect parsing of strings not     containing an expected space. A remote attacker can     exploit this, via a specially crafted XML document, to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2012-5134)

  - An arbitrary file modification vulnerability due to     improper handling of certain Virtual Machine file     descriptors. A local attacker can exploit this to read     or modify arbitrary files. (CVE-2013-5973)

The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not 'properly restrict the use of' the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405.

a. vCenter Server Appliance directory traversal

   The vCenter Server Appliance (vCSA) contains a directory    traversal vulnerability that allows an authenticated    remote user to retrieve arbitrary files. Exploitation of    this issue may expose sensitive information stored on the    server. 

   VMware would like to thank Alexander Minozhenko from ERPScan for    reporting this issue to us.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-6324 to this issue.

 b. vCenter Server Appliance arbitrary file download

   The vCenter Server Appliance (vCSA) contains an XML parsing    vulnerability that allows an authenticated remote user to    retrieve arbitrary files.  Exploitation of this issue may    expose sensitive information stored on the server.

   VMware would like to thank Alexander Minozhenko from ERPScan for    reporting this issue to us.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-6325 to this issue.

 c. Update to ESX glibc package

   The ESX glibc package is updated to version glibc-2.5-81.el5_8.1    to resolve multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2009-5029, CVE-2009-5064,    CVE-2010-0830, CVE-2011-1089, CVE-2011-4609, CVE-2012-0864    CVE-2012-3404, CVE-2012-3405, CVE-2012-3406 and CVE-2012-3480    to these issues.

 d. vCenter Server and vCSA webservice logging denial of service

   The vCenter Server and vCenter Server Appliance (vCSA) both    contain a vulnerability that allows unauthenticated remote    users to create abnormally large log entries.  Exploitation    of this issue may allow an attacker to fill the system volume    of the vCenter host or appliance VM and create a    denial-of-service condition. 

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-6326 to this issue.

This collective update to the GNU Lib C library (glibc) provides the following fixes :

  - Make addmntent() return errors also for cached streams.
    (bnc#676178, CVE-2011-1089)

  - Fix overflows in vfprintf(). (bnc#770891, CVE-2012-3406)

  - Fix incomplete results from nscd. (bnc#753756)

  - Fix a deadlock in dlsym in case the symbol isn't found,     for multi-threaded programs. (bnc#760216)

ID	名稱	產品	系列	已發布	已更新	嚴重性
83565	SUSE SLED10 / SLES10 Security Update : glibc (SUSE-SU-2012:1488-1)	Nessus	SuSE Local Security Checks	2015/5/20	2021/1/19	medium
60054	CentOS 5 : glibc (CESA-2012:1097)	Nessus	CentOS Local Security Checks	2012/7/19	2021/1/4	medium
60066	CentOS 6 : glibc (CESA-2012:1098)	Nessus	CentOS Local Security Checks	2012/7/20	2021/1/4	medium
61369	Scientific Linux Security Update : glibc on SL6.x i386/x86_64 (20120718)	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	medium
62388	Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 / 12.04 LTS : eglibc, glibc vulnerabilities (USN-1589-1)	Nessus	Ubuntu Local Security Checks	2012/10/2	2019/9/19	medium
64150	SuSE 11.2 Security Update : glibc (SAT Patch Number 7110)	Nessus	SuSE Local Security Checks	2013/1/25	2021/1/19	medium
82421	Mandriva Linux Security Advisory : glibc (MDVSA-2015:168)	Nessus	Mandriva Local Security Checks	2015/3/30	2021/1/14	high
70886	ESXi 5.1 < Build 1063671 Multiple Vulnerabilities (remote check)	Nessus	Misc.	2013/11/13	2018/11/15	medium
82577	F5 Networks BIG-IP : GNU C Library (glibc) vulnerability (SOL16364)	Nessus	F5 Networks Local Security Checks	2015/4/6	2019/1/4	medium
60058	RHEL 6 : glibc (RHSA-2012:1098)	Nessus	Red Hat Local Security Checks	2012/7/19	2021/1/14	medium
63332	VMSA-2012-0018 : VMware security updates for vCSA and ESXi	Nessus	VMware ESX Local Security Checks	2012/12/24	2021/1/6	high
62960	SuSE 10 Security Update : glibc (ZYPP Patch Number 8351)	Nessus	SuSE Local Security Checks	2012/11/19	2021/1/19	medium

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