Input validation error in Glibc - CVE-2010-4051
Published: January 13, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45457
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2010-4051
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: GNU
Affected software:
Glibc
Glibc
Detailed vulnerability description
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."
How to mitigate CVE-2010-4051
Install update from vendor's website.
Sources
- http://cxib.net/stuff/proftpd.gnu.c
- http://seclists.org/fulldisclosure/2011/Jan/78
- http://secunia.com/advisories/42547
- http://securityreason.com/achievement_securityalert/93
- http://securityreason.com/securityalert/8003
- http://securitytracker.com/id?1024832
- http://www.exploit-db.com/exploits/15935
- http://www.kb.cert.org/vuls/id/912279
- http://www.securityfocus.com/archive/1/515589/100/0/threaded
- http://www.securityfocus.com/bid/45233
- https://bugzilla.redhat.com/show_bug.cgi?id=645859