Input validation error in GNU C Library (glibc) - CVE-2009-5029
Published: May 2, 2013 / Updated: August 11, 2020
Vulnerability identifier: #VU42856
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2009-5029
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Integer overflow in the __tzfile_read function in glibc before 2.15 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted timezone (TZ) file, as demonstrated using vsftpd.
Affected software
GNU C Library (glibc)
Amazon Linux AMI
SUSE Linux
Slackware Linux
Amazon Linux AMI
SUSE Linux
Slackware Linux
How to mitigate CVE-2009-5029
Install update from vendor's website.
Links to Public Exploits and PoC-codes
External References
- http://dividead.wordpress.com/2009/06/01/glibc-timezone-integer-overflow/
- http://lists.grok.org.uk/pipermail/full-disclosure/2011-December/084452.html
- http://sourceware.org/git/?p=glibc.git;a=commit;h=97ac2654b2d831acaa18a2b018b0736245903fd2
- http://sourceware.org/ml/libc-alpha/2011-12/msg00037.html
- https://bugzilla.redhat.com/show_bug.cgi?id=761245