CVE-2019-18976

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    CVE-2019-18976

    Published: 22 Nov 2019Last Modified: 8 Jul 2026

    Summary:

    Details: An issue was discovered in res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.

    References: http://downloads.asterisk.org/pub/security/AST-2019-008.html, https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html, https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html, https://seclists.org/fulldisclosure/2019/Nov/20, https://www.asterisk.org/downloads/security-advisories, https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 85335355efb2d7914a1fe20ed31afcef15fd210c
    Fixed -None

    Affected versions

    13.21

    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
    CVE-2019-18976 | CVE-DB