CVE-2017-17850

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    CVE-2017-17850

    Published: 27 Dec 2017Last Modified: 8 Jul 2026

    Summary:

    Details: An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.

    References: http://downloads.asterisk.org/pub/security/AST-2017-014.html, http://www.securitytracker.com/id/1040056, https://security.gentoo.org/glsa/201811-11, https://issues.asterisk.org/jira/browse/ASTERISK-27480

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 85335355efb2d7914a1fe20ed31afcef15fd210c
    Fixed -None

    Affected versions

    13.1.0
    13.1.0-rc1
    13.1.0-rc2

    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