UBUNTU-CVE-2019-18976

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    UBUNTU-CVE-2019-18976

    Published: 22 Nov 2019Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-18976

    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: https://ubuntu.com/security/CVE-2019-18976, https://downloads.asterisk.org/pub/security/AST-2019-008.html, https://issues.asterisk.org/jira/browse/ASTERISK-28612, http://downloads.asterisk.org/pub/security/AST-2019-008.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, https://www.cve.org/CVERecord?id=CVE-2019-18976

    Affected packages

    Package

    Name: asterisk

    Purl: pkg:deb/ubuntu/asterisk@1:13.1.0~dfsg-1.1ubuntu4.1+esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1:13.1.0~dfsg-1.1ubuntu3
    1:13.1.0~dfsg-1.1ubuntu4
    1:13.1.0~dfsg-1.1ubuntu4.1
    1:13.1.0~dfsg-1.1ubuntu4.1+esm1

    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
    UBUNTU-CVE-2019-18976 | CVE-DB