CVE-2021-32686
ring - security update
Description
PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In PJSIP before version 2.11.1, there are a couple of issues found in the SSL socket. First, a race condition between callback and destroy, due to the accepted socket having no group lock. Second, the SSL socket parent/listener may get destroyed during handshake. Both issues were reported to happen intermittently in heavy load TLS connections. They cause a crash, resulting in a denial of service. These are fixed in version 2.11.1.
How to fix CVE-2021-32686
To remediate CVE-2021-32686, upgrade the affected package to a fixed version below.
- —upgrade to 2.11.1-r0 or later
- —upgrade to 1:16.16.1~dfsg-1+deb11u1 or later
- —upgrade to 2.5.5~dfsg-6+deb9u3 or later
- —upgrade to 20210112.2.b757bac~ds1-1+deb11u1 or later
- —upgrade to 20210112.2.b757bac~ds1-1+deb11u1 or later
Is CVE-2021-32686 being exploited?
Low — EPSS is 1.7%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0, < 2.11.1-r0
- from 0, < 1:16.16.1~dfsg-1+deb11u1
- from 0, < 2.5.5~dfsg-6+deb9u3
- from 0, < 20210112.2.b757bac~ds1-1+deb11u1
- from 0, < 20210112.2.b757bac~ds1-1+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |