01 Record

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

HighPUBLISHEDCNA: redhat

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.58% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 75.0% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-05-17 00:00Z3 YR AGO

Last updated

2025-01-22 18:25Z1 YR AGO

Reserved

2023-04-26

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

ea2916c571305d2de541ba588c78e6714338c9972f998f8f1320e4816a624119

05 Affected products

VendorProductVersionsPlatforms

n/alibreswanAffects 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—

06 References

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

07 Fixed in

AlmaLinux 8

libreswan
Fixed in 4.9-3.el8_8

AlmaLinux 9

libreswan
Fixed in 4.9-4.el9_2

CloudLinux 8

libreswan
Fixed in 4.9-3.el8_8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

CloudLinux 9

libreswan
Fixed in 4.9-4.el9_2

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.