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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Check for the version of the glibc packages
Detailed Explanation for this Vulnerability Assessment
Updated glibc packages that address several bugs are now available.
This update has been rated as having low security impact by the Red Hat
Security Response Team.
The GNU libc packages (known as glibc) contain the standard C libraries
used by applications.
It was discovered that the use of LD_DEBUG, LD_SHOW_AUXV, and
LD_DYNAMIC_WEAK were not restricted for a setuid program. A local user
could utilize this flaw to gain information, such as the list of symbols
used by the program. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CVE-2004-1453 to this issue.
This erratum addresses the following bugs in the GNU C Library:
- fix stack alignment in IA-32 clone
- fix double free in globfree
- fix fnmatch to avoid jumping based on unitialized memory read
- fix fseekpos after ungetc
- fix TZ env var handling if the variable ends with + or -
- avoid depending on values read from unitialized memory in strtold
on certain architectures
- fix mapping alignment computation in dl-load
- fix i486+ strncat inline assembly
- make gethostid/sethostid work on bi-arch platforms
- fix ppc64 getcontext/swapcontext
- fix pthread_exit if called after pthread_create, but before the created
thread actually started
- fix return values for tgamma (+-0)
- fix handling of very long lines in /etc/hosts
- avoid page aliasing of thread stacks on AMD64
- avoid busy loop in malloc if concurrent with fork
- permit putenv and setenv in shared library constructors
- fix restoring of CCR in swapcontext and getcontext on ppc64
- avoid using sigaction (SIGPIPE, ...) in syslog implementation
All users of glibc should upgrade to these updated packages, which resolve
Solution : http://rhn.redhat.com/errata/RHSA-2005-256.html
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Tenable Network Security
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