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    CVE-2012-4502

    Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted (3) RPY_SUBNETS_ACCESSED, (4) RPY_CLIENT_ACCESSES, (5) RPY_CLIENT_ACCESSES_BY_INDEX, or (6) RPY_MANUAL_LIST command reply to the PKL_ReplyLength function, which triggers an out-of-bounds read or buffer overflow. NOTE: versions 1.27 and 1.28 do not require authentication to exploit.

    Published:Aug 9, 2013
    Last Modified:Apr 11, 2025
    EPS:Nov 5, 2013
    EPSS Score:0.00946
    CVSS Score:5

    Affected Products

    Vendor
    Tuxfamily
    Product
    Chrony

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2015-1821 (CVSS 6.5) — Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of serv…
    CVE-2015-1822 (CVSS 6.5) — chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command…
    CVE-2015-1853 (CVSS 6.5) — chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, wh…
    CVE-2012-4503 (CVSS 5) — cmdmon.c in Chrony before 1.29 allows remote attackers to obtain potentially sensitive information from stack …
    CVE-2010-0293 (CVSS 5) — The client logging functionality in chronyd in Chrony before 1.23.1 does not restrict the amount of memory use…
    CVE-2010-0294 (CVSS 5) — chronyd in Chrony before 1.23.1, and possibly 1.24-pre1, generates a syslog message for each unauthorized cmdm…
    CVE-2010-0292 (CVSS 5) — The read_from_cmd_socket function in cmdmon.c in chronyd in Chrony before 1.23.1, and 1.24-pre1, allows remote…

    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