CVE-2023-22741 heap-over-flow in stun_parse_attribute in sofia-sip
A heap overflow in the Sofia-SIP library allows remote attackers to achieve code execution via crafted STUN packets due to missing length checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-22741?
CVE-2023-22741 is a critical memory corruption vulnerability in freeswitch sofia-sip, published on 19 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification. In affected versions Sofia-SIP **lacks both message length and attributes length checks** when it handles STUN packets, leading to controllable heap-over-flow. For example, in stun_parse_attribute(), after we get the attribute's type and length value, the length will be used directly to copy from the heap, regardless of the message's left size. Since network users control the overflowed length, and the data is written to heap chunks later, attackers may achieve remote code execution by heap grooming or other exploitation methods. The bug was introduced 16 years ago in sofia-sip 1.12.4 (plus some patches through 12/21/2006) to in tree libs with git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3774 d0543943-73ff-0310-b7d9-9358b9ac24b2. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Which versions are affected by CVE-2023-22741?
It affects 1 product.
Products include Signalwire Sofia-Sip.
How do I fix CVE-2023-22741?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-22741 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-22741 exists.
Sources
Also known as ALPINE-CVE-2023-22741, DEBIAN-CVE-2023-22741, DLA-3292-1, GHSA-8599-x7rq-fr54, MGASA-2023-0040, UBUNTU-CVE-2023-22741.