CVE-2012-6711

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    CVE-2012-6711

    Published: 18 Jun 2019Last Modified: 10 Apr 2026

    Summary:

    Details: A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the "echo -e" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv().

    References: http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5, https://bugzilla.redhat.com/show_bug.cgi?id=1721071, http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5, http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5, https://bugzilla.redhat.com/show_bug.cgi?id=1721071, http://www.securityfocus.com/bid/108824, https://support.f5.com/csp/article/K05122252, https://support.f5.com/csp/article/K05122252?utm_source=f5support&amp%3Butm_medium=RSS, https://usn.ubuntu.com/4180-1/

    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
    CVE-2012-6711 | CVE-DB