CVE-2017-16872

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-11-17 · updated 2026-06-17
Weakness: CWE-119

Description

An issue was discovered in Teluu pjproject (pjlib and pjlib-util) in PJSIP before 2.7.1. Parsing the numeric header fields in a SIP message (like cseq, ttl, port, etc.) all had the potential to overflow, either causing unintended values to be captured or, if the values were subsequently converted back to strings, a buffer overrun. This will lead to a potential exploit using carefully crafted invalid values.

Affected products

Debian Linux: 9.0
teluu pjsip: before 2.7.1 — fixed in 2.7.1

How to fix

Upgrade to a fixed version: teluu pjsip 2.7.1. Check the vendor advisory for mitigations.

References

https://trac.pjsip.org/repos/milestone/release-2.7.1
https://trac.pjsip.org/repos/ticket/2056
https://www.debian.org/security/2018/dsa-4170
https://trac.pjsip.org/repos/milestone/release-2.7.1
https://trac.pjsip.org/repos/ticket/2056
https://www.debian.org/security/2018/dsa-4170

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