CVE-2023-38712 Null dereference in n/a
A NULL pointer dereference in Libreswan's IKEv1 handling allows remote attackers to crash the pluto daemon, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-38712?
CVE-2023-38712 is a medium-severity vulnerability in n/a, published on 25 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in Libreswan 3.x and 4.x before 4.12. When an IKEv1 ISAKMP SA Informational Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA, such as a duplicated Delete/Notify message, a NULL pointer dereference on the deleted state causes the pluto daemon to crash and restart.
Weakness: CWE-476
Which versions are affected by CVE-2023-38712?
It affects 1 product.
Products include Libreswan Libreswan.
How do I fix CVE-2023-38712?
Upgrade to a fixed version.
Is CVE-2023-38712 being exploited?
There is no known exploitation of CVE-2023-38712 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2013-7283 Race condition in n/a
- CVE-2026-12413 IKEv2 Denial of Service via malformed fragmentation
- CVE-2026-50721 IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload
- CVE-2026-50722 IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload
- CVE-2023-30570 Denial of service in n/a
Sources
Also known as AZL-28066, AZL-34937, CLSA-2025-1757962152, DEBIAN-CVE-2023-38712, GHSA-65xr-g9j5-jv8g, UBUNTU-CVE-2023-38712.