CVE-2024-3652

Summary

The Libreswan Project was notified of an issue causing libreswan to restart when using IKEv1 without specifying an esp= line. When the peer requests AES-GMAC, libreswan's default proposal handler causes an assertion failure and crashes and restarts. IKEv2 connections are not affected.

Affected Software

Weaknesses

• IKEv1 with default AH/ESP configuration can cause libreswan to abort and restart

Workarounds

As a workaround, adding an esp= line to all IKEv1 connections works around the issue. An example covering most common default configurations would be: esp=aes-sha2_512,aes-sha1,aes-sha2_256,aes-md5,3des-sha1,3des-md5.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

CVE Program Container

Additional References

• https://libreswan.org/security/CVE-2024-3652
• http://www.openwall.com/lists/oss-security/2024/04/18/2

References

• https://libreswan.org/security/CVE-2024-3652
• http://www.openwall.com/lists/oss-security/2024/04/18/2

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