What’s Vulnerable › Vulnerabilities

CVE-2023-2295

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-17 · updated 2026-06-17
• Weakness: CWE-400

Description

A vulnerability was found in the libreswan library. This security issue occurs when an IKEv1 Aggressive Mode packet is received with only unacceptable crypto algorithms, and the response packet is not sent with a zero responder SPI. When a subsequent packet is received where the sender reuses the libreswan responder SPI as its own initiator SPI, the pluto daemon state machine crashes. No remote code execution is possible. This CVE exists because of a CVE-2023-30570 security regression for libreswan package in Red Hat Enterprise Linux 8.8 and Red Hat Enterprise Linux 9.2.

Affected products

• The Libreswan Project libreswan: 4.9-1.el8, 4.9-1.el9
• Red Hat Enterprise Linux: 8.0, 9.0
• RedHat Enterprise Linux Eus: 8.8, 9.2
• RedHat Enterprise Linux Server Aus: 8.8, 9.2
• RedHat Enterprise Linux Server Tus: 8.8

References

• https://access.redhat.com/errata/RHSA-2023:3107
• https://access.redhat.com/errata/RHSA-2023:3148
• https://access.redhat.com/security/cve/CVE-2023-2295
• https://bugzilla.redhat.com/show_bug.cgi?id=2189777
• https://access.redhat.com/errata/RHSA-2023:3107
• https://access.redhat.com/errata/RHSA-2023:3148
• https://access.redhat.com/security/cve/CVE-2023-2295
• https://bugzilla.redhat.com/show_bug.cgi?id=2189777

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