UBUNTU-CVE-2018-16657

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    UBUNTU-CVE-2018-16657

    Published: 7 Sept 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-16657
    Aliases:
    USN-6022-1

    Summary:

    Details: In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with an invalid Via header causes a segmentation fault and crashes Kamailio. The reason is missing input validation in the crcitt_string_array core function for calculating a CRC hash for To tags. (An additional error is present in the check_via_address core function: this function also misses input validation.) This could result in denial of service and potentially the execution of arbitrary code.

    References: https://ubuntu.com/security/CVE-2018-16657, https://skalatan.de/blog/advisory-hw-2018-06, https://github.com/kamailio/kamailio/commit/ad68e402ece8089f133c10de6ce319f9e28c0692, https://github.com/kamailio/kamailio/commit/d67b2f9874ca23bd69f18df71b8f53b1b6151f6d, https://github.com/kamailio/kamailio/commit/f07dabffef98c7088cdbc2bd695a4ae7a241b159, https://ubuntu.com/security/notices/USN-6022-1, https://www.cve.org/CVERecord?id=CVE-2018-16657

    Affected packages

    Package

    Name: kamailio

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.3.4-1.1ubuntu2.1+esm1

    Affected versions

    4.3.1-2ubuntu1
    4.3.4-1.1ubuntu1
    4.3.4-1.1ubuntu2
    4.3.4-1.1ubuntu2.1

    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