Home/CVE/PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versio
CVE

CVE-2023-27585

PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versio

PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versions 2.13 and prior affects applications that use PJSIP DNS resolver. It doesn't affect PJSIP users who do not utilise PJSIP DNS resolver.

This vulnerability is related to CVE-2022-24793. The difference is that this issue is in parsing the query record parse_query(), while the issue in CVE-2022-24793 is in parse_rr(). A patch is available as commit d1c5e4d in the master branch.

A workaround is to disable DNS resolution in PJSIP config (by setting nameserver_count to zero) or use an external resolver implementation instead.

HIGH · CVSS 7.5 EPSS 0.00537
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-122Heap-based Buffer Overflow
▤

Affected Products & Versions

1
teluu pjsip< 2.13
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Mar 2023 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
usnUSN-6422-2
usnUSN-6422-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/pjsip/pjproject/commit/d1c5e4da5bae7f220bc30719888bb389c905c0c5Patch
https://github.com/pjsip/pjproject/security/advisories/GHSA-p6g5-v97c-w5q4Vendor Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-q9cp-8wcq-7pfrPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00020.html
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://www.debian.org/security/2023/dsa-5438
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