HOMEVULNERABILITIESCVE-2023-2295
HIGH

CVE-2023-2295

CWE-400Published: May 17, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-2295 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

libreswan1 product(s)
libreswan
Red Hat4 product(s)
enterprise linuxenterprise linux eusenterprise linux server ausenterprise linux server tus
Source: NVD CPE · 9 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://access.redhat.com/errata/RHSA-2023:3107
ADVISORYhttps://access.redhat.com/errata/RHSA-2023:3148
ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-2295
ADVISORYhttps://access.redhat.com/errata/RHSA-2023:3107
ADVISORYhttps://access.redhat.com/errata/RHSA-2023:3148
ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-2295

All References (8)

→
https://access.redhat.com/errata/RHSA-2023:3107Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2023:3148Third Party Advisory
→
https://access.redhat.com/security/cve/CVE-2023-2295Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=2189777Issue Tracking
→
https://access.redhat.com/errata/RHSA-2023:3107Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2023:3148Third Party Advisory
→
https://access.redhat.com/security/cve/CVE-2023-2295Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=2189777Issue Tracking

Quick Facts

CVE IDCVE-2023-2295
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected2 vendor(s)
PublishedMay 17, 2023

Related CVEs (CWE-400)

CVE-2024-36543
9.8
CVE-2017-1000378
9.8
CVE-2023-28507
9.8
CVE-2019-10952
9.8
CVE-2017-9119
9.8
CVE-2022-48716
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-2295 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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