CVE-2022-31003 — Sofia-SIP is an open-source Session Initiation Protocol (SIP) User-Agent library

Sofia-SIP is an open-source Session Initiation Protocol (SIP) User-Agent library. Prior to version 1.13.8, when parsing each line of a sdp message, `rest = record + 2` will access the memory behind `\0` and cause an out-of-bounds write. An attacker can send a message with evil sd

01What is this vulnerability?

Sofia-SIP is an open-source Session Initiation Protocol (SIP) User-Agent library. Prior to version 1.13.8, when parsing each line of a sdp message, `rest = record + 2` will access the memory behind `\0` and cause an out-of-bounds write. An attacker can send a message with evil sdp to FreeSWITCH, causing a crash or more serious consequence, such as remote code execution. Version 1.13.8 contains a…

02Affected products

Vendor	Product	Versions
freeswitch	sofia	sip — < 1.13.8

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-05-31T00:00:00.000Z
• Last modified: 2025-04-22T17:55:56.743Z

09References

• github.com — https://github.com/freeswitch/sofia-sip/security/advisories/GHSA-8w5j-6g2j-pxcp
• github.com — https://github.com/freeswitch/sofia-sip/commit/907f2ac0ee504c93ebfefd676b4632a35…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2022/09/msg00001.html
• security.gentoo.org — https://security.gentoo.org/glsa/202210-18
• www.debian.org — https://www.debian.org/security/2023/dsa-5410