CVE-2021-43845
9.1
CRITICAL
CVSS 3.1
EPSS 0.29%
Description
PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.
How to fix CVE-2021-43845
To remediate CVE-2021-43845, upgrade the affected package to a fixed version below.
- —upgrade to 2.12-r0 or later
- —upgrade to 1:16.28.0~dfsg-0+deb11u1 or later
- —upgrade to 20210112.2.b757bac~ds1-1+deb11u1 or later
Is CVE-2021-43845 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.12-r0
- from 0, < 1:16.28.0~dfsg-0+deb11u1
- from 0, < 20210112.2.b757bac~ds1-1+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |