CVE-2023-38710

An issue was discovered in Libreswan before 4.12. When an IKEv2 Child SA REKEY packet contains an invalid IPsec protocol ID number of 0 or 1, an error notify INVALID_SPI is sent back. The notify payload's protocol ID is copied from the incoming packet, but the code that verifies outgoing packets fails an assertion that the protocol ID must be ESP (2) or AH(3) and causes the pluto daemon to crash and restart. NOTE: the earliest affected version is 3.20.

• https://github.com/libreswan/libreswan/tagsThird Party Advisory
• https://libreswan.org/security/CVE-2023-38710/Third Party Advisory
• https://github.com/libreswan/libreswan/tagsThird Party Advisory
• https://libreswan.org/security/CVE-2023-38710/Third Party Advisory

Published

Aug 25, 2023

Last Modified

Jun 17, 2026

Status

Modified

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