CVE-2010-4051

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    CVE-2010-4051

    Published: 13 Jan 2011Last Modified: 10 Apr 2026

    Summary:

    Details: 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."

    References: http://secunia.com/advisories/42547, http://seclists.org/fulldisclosure/2011/Jan/78, http://securityreason.com/achievement_securityalert/93, http://securityreason.com/securityalert/8003, http://www.securityfocus.com/bid/45233, https://bugzilla.redhat.com/show_bug.cgi?id=645859, http://cxib.net/stuff/proftpd.gnu.c, 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, https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High