Bug 2225369 (CVE-2023-38712) - CVE-2023-38712 libreswan: Invalid IKEv1 repeat IKE SA delete causes crash and restart
Summary: CVE-2023-38712 libreswan: Invalid IKEv1 repeat IKE SA delete causes crash and...
Keywords:
Status: NEW
Alias: CVE-2023-38712
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2215955 2215956 2230238
Blocks: 2225370
TreeView+ depends on / blocked
 
Reported: 2023-07-25 05:37 UTC by TEJ RATHI
Modified: 2023-08-16 05:42 UTC (History)
3 users (show)

Fixed In Version: libreswan 4.12
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference vulnerability was found in the Libreswan package. 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 occurs. This flaw allows a malicious client or attacker to send a malformed IKEv1 Delete/Notify packet, causing a crash and restarting the libreswan pluto daemon. When sent continuously, this could lead to a denial of service attack.
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Description TEJ RATHI 2023-07-25 05:37:15 UTC 
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.

https://libreswan.org/security/CVE-2023-38712/CVE-2023-38712.txt
Comment 1 TEJ RATHI 2023-07-25 06:08:23 UTC 
Vulnerable versions : libreswan 3.00 - 4.11
Not vulnerable      : libreswan 4.12+

Vulnerable code was present from the first release of libreswan i.e libreswan v3.0 (likely the same vulnerability exists in all openswan versions)
Comment 2 TEJ RATHI 2023-08-09 05:29:27 UTC 
This CVE is now public by upstream:

https://libreswan.org/security/CVE-2023-38712/CVE-2023-38712.txt
https://libreswan.org/security/CVE-2023-38712/CVE-2023-38712.patch
Comment 3 TEJ RATHI 2023-08-09 05:39:29 UTC 
Created libreswan tracking bugs for this issue:

Affects: fedora-all [bug 2230238]
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