Resource exhaustion in Libreswan
CVE-2023-2295
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.016 (73.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Libreswan — versions 4.9-1.el8, 4.9-1.el9
- Redhat Enterprise_linux — versions 8.0, 9.0
- Redhat Enterprise_linux_eus — versions 8.8, 9.2
- Redhat Enterprise_linux_server_aus — versions 8.8, 9.2
- Redhat Enterprise_linux_server_tus — versions 8.8
- N/a Libreswan — versions Affects libreswan v4.9-1.el8 and libreswan v4.9-1.el9, Fixed in libreswan v4.9-3.el8_8 and libreswan v4.9-4.el9_2
Weakness classification (CWE)
References
- secalert@redhat.com (Issue Tracking)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-2295?
- CVE-2023-2295 is a high-severity vulnerability in Libreswan, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-05-17.
- How severe is CVE-2023-2295?
- High severity. CVSS v3 base score is 7.5 out of 10.