SB2011011302 - Multiple vulnerabilities in GNU Glibc

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Main Vulnerability Database SB2011011302

SB2011011302 - Multiple vulnerabilities in GNU Glibc

Published: January 13, 2011 Updated: August 11, 2020

Security Bulletin ID SB2011011302
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Configuration (CVE-ID: CVE-2011-1089)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The addmntent function in the GNU C Library (aka glibc or libc6) 2.13 and earlier does not report an error status for failed attempts to write to the /etc/mtab file, which makes it easier for local users to trigger corruption of this file, as demonstrated by writes from a process with a small RLIMIT_FSIZE value, a different vulnerability than CVE-2010-0296.


2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2011-1658)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

ld.so in the GNU C Library (aka glibc or libc6) 2.13 and earlier expands the $ORIGIN dynamic string token when RPATH is composed entirely of this token, which might allow local users to gain privileges by creating a hard link in an arbitrary directory to a (1) setuid or (2) setgid program with this RPATH value, and then executing the program with a crafted value for the LD_PRELOAD environment variable, a different vulnerability than CVE-2010-3847 and CVE-2011-0536. NOTE: it is not expected that any standard operating-system distribution would ship an applicable setuid or setgid program.


3) Input validation error (CVE-ID: CVE-2011-1659)

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Integer overflow in posix/fnmatch.c in the GNU C Library (aka glibc or libc6) 2.13 and earlier allows context-dependent attackers to cause a denial of service (application crash) via a long UTF8 string that is used in an fnmatch call with a crafted pattern argument, a different vulnerability than CVE-2011-1071.


4) Input validation error (CVE-ID: CVE-2010-4051)

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The regcomp implementation in the GNU C Library (aka glibc or libc6) through 2.11.3, and 2.12.x through 2.12.2, allows context-dependent attackers to cause a denial of service (application crash) via a regular expression containing adjacent bounded repetitions that bypass the intended RE_DUP_MAX limitation, as demonstrated by a {10,}{10,}{10,}{10,}{10,} sequence in the proftpd.gnu.c exploit for ProFTPD, related to a "RE_DUP_MAX overflow."


5) Resource management error (CVE-ID: CVE-2010-4052)

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Stack consumption vulnerability in the regcomp implementation in the GNU C Library (aka glibc or libc6) through 2.11.3, and 2.12.x through 2.12.2, allows context-dependent attackers to cause a denial of service (resource exhaustion) via a regular expression containing adjacent repetition operators, as demonstrated by a {10,}{10,}{10,}{10,} sequence in the proftpd.gnu.c exploit for ProFTPD.


Remediation

Install update from vendor's website.

References