CVE-2021-41141 Missing release of locks in PJSIP

What is CVE-2021-41141?

CVE-2021-41141 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 4 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

PJSIP is a free and open source multimedia communication library written in the C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In various parts of PJSIP, when error/failure occurs, it is found that the function returns without releasing the currently held locks. This could result in a system deadlock, which cause a denial of service for the users. No release has yet been made which contains the linked fix commit. All versions up to an including 2.11.1 are affected. Users may need to manually apply the patch.

Weakness: CWE-667

Which versions are affected by CVE-2021-41141?

It affects 2 products.

Products include Debian Debian Linux, Teluu Pjsip.

How do I fix CVE-2021-41141?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-41141 being exploited?

There is no known exploitation of CVE-2021-41141 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

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

Also known as ALPINE-CVE-2021-41141, GHSA-8fmx-hqw7-6gmc, UBUNTU-CVE-2021-41141.