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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-4052
• https://bugzilla.redhat.com/show_bug.cgi?id=645859
• 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