CVE-2022-23547 Heap buffer overflow in pjproject when decoding STUN message
A heap buffer overflow in PJSIP allows attackers to execute code or cause denial of service via crafted STUN messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-23547?
CVE-2022-23547 is a medium-severity memory corruption vulnerability in pjsip pjproject, published on 23 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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. This issue is similar to GHSA-9pfh-r8x4-w26w. Possible buffer overread when parsing a certain STUN message. The vulnerability affects applications that uses STUN including PJNATH and PJSUA-LIB. The patch is available as commit in the master branch.
Which versions are affected by CVE-2022-23547?
It affects 1 product.
Products include Pjsip Pjsip.
How do I fix CVE-2022-23547?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-23547 being exploited?
There is no known exploitation of CVE-2022-23547 in the wild and no public exploit code.
Other vulnerabilities in pjsip pjproject
- CVE-2026-28799 PJSIP: Heap use-after-free in PJSIP presence subscription termination handler
- CVE-2026-29068 PJSIP: Stack buffer overflow in Opus codec parser
- CVE-2026-40614 PJSIP: Heap buffer overflow in Opus codec decoding
- CVE-2026-32945 PJSIP is vulnerable to Heap-based Buffer Overflow through DNS parser
- CVE-2026-40892 PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()
Sources
Also known as DEBIAN-CVE-2022-23547, UBUNTU-CVE-2022-23547.