CVE-2019-13161 Null dereference in n/a

What is CVE-2019-13161?

CVE-2019-13161 is a medium-severity vulnerability in Debian Debian Linux, published on 12 Jul 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).

Weakness: CWE-476

Which versions are affected by CVE-2019-13161?

It affects 3 products.

Products include Debian Debian Linux, Digium Asterisk, Digium Certified Asterisk.

How do I fix CVE-2019-13161?

Apply the vendor's patch.

Is CVE-2019-13161 being exploited?

There is no known exploitation of CVE-2019-13161 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2019-13161, DEBIAN-CVE-2019-13161, GHSA-5x75-h4p9-mf5p, UBUNTU-CVE-2019-13161.