CVE-2012-5573

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    CVE-2012-5573

    Published: 1 Jan 2013Last Modified: 10 Apr 2026

    Summary:

    Details: The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote attackers to cause a denial of service (memory consumption or excessive cell reception rate) or bypass intended flow-control restrictions via a RELAY_COMMAND_SENDME command.

    References: http://secunia.com/advisories/51329, http://security.gentoo.org/glsa/glsa-201301-03.xml, https://trac.torproject.org/projects/tor/ticket/6252, https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16, https://bugzilla.redhat.com/show_bug.cgi?id=880310, http://openwall.com/lists/oss-security/2012/11/26/11, https://bugs.gentoo.org/show_bug.cgi?id=444804, https://exchange.xforce.ibmcloud.com/vulnerabilities/80289, https://gitweb.torproject.org/tor.git/blob/release-0.2.3:/ReleaseNotes

    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