CVE-2012-3461

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    CVE-2012-3461

    Published: 20 Aug 2012Last Modified: 10 Apr 2026

    Summary:

    Details: The (1) otrl_base64_otr_decode function in src/b64.c; (2) otrl_proto_data_read_flags and (3) otrl_proto_accept_data functions in src/proto.c; and (4) decode function in toolkit/parse.c in libotr before 3.2.1 allocates a zero-length buffer when decoding a base64 string, which allows remote attackers to cause a denial of service (application crash) via a message with the value "?OTR:===.", which triggers a heap-based buffer overflow.

    References: http://www.debian.org/security/2012/dsa-2526, http://www.mandriva.com/security/advisories?name=MDVSA-2012:131, http://www.mandriva.com/security/advisories?name=MDVSA-2013:097, http://www.ubuntu.com/usn/USN-1541-1, https://bugzilla.redhat.com/show_bug.cgi?id=846377, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684121, http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001347.html, http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001348.html, http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00016.html, http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00019.html, http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00019.html, http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=1902baee5d4b056850274ed0fa8c2409f1187435, http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=6d4ca89cf1d3c9a8aff696c3a846ac5a51f762c1, http://otr.git.sourceforge.net/git/gitweb.cgi?p=otr/libotr%3Ba=commitdiff%3Bh=b17232f86f8e60d0d22caf9a2400494d3c77da58, http://www.securityfocus.com/bid/54907, https://exchange.xforce.ibmcloud.com/vulnerabilities/77528

    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