CVE-2023-38711 Null dereference in n/a
A NULL pointer dereference in Libreswan's IKEv1 Quick Mode 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-2023-38711?
CVE-2023-38711 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 before 4.12. When an IKEv1 Quick Mode connection configured with ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6.
Weakness: CWE-476
Which versions are affected by CVE-2023-38711?
It affects 1 product.
Products include Libreswan Libreswan.
How do I fix CVE-2023-38711?
Upgrade to a fixed version.
Is CVE-2023-38711 being exploited?
There is no known exploitation of CVE-2023-38711 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-28065, AZL-34936, CLSA-2025-1757947429, DEBIAN-CVE-2023-38711, GHSA-prwp-xrv5-5jv3, UBUNTU-CVE-2023-38711.