Input validation error in GNU C Library (glibc) - CVE-2009-5155
Published: March 1, 2019
Vulnerability identifier: #VU17885
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2009-5155
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input passed to parse_reg_exp() function in posix/regcomp.c . A local user can send specially crafted input to application that uses the affected version of glibc and perform denial of service attack.
Affected software
GNU C Library (glibc)
Ubuntu
libc6 (Ubuntu package)
Ubuntu
libc6 (Ubuntu package)
How to mitigate CVE-2009-5155
Install updates from vendor's website.
GNU C Library (glibc) - update to 2.29
libc6 (Ubuntu package) - update to 2.23-0ubuntu11.3
libc6 (Ubuntu package) - update to 2.23-0ubuntu11.3
External References
- http://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=5513b40999149090987a0341c018d05d3eea1272
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=22793
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=32806
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34238
- https://sourceware.org/bugzilla/show_bug.cgi?id=11053
- https://sourceware.org/bugzilla/show_bug.cgi?id=18986
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=eb04c21373e2a2885f3d52ff192b0499afe3c672