Libreswan on Red Hat IKEv1 Aggressive Mode Packet resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Libreswan on Red Hat. This vulnerability affects unknown code of the component IKEv1 Aggressive Mode Packet Handler. Performing a manipulation results in resource consumption. This vulnerability is reported as CVE-2023-2295. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Libreswan on Red Hat (affected version not known). This affects some unknown functionality of the component IKEv1 Aggressive Mode Packet Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was disclosed 05/18/2023 as RHSA-2023:3107. It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2023-2295 since 04/26/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 260139 (Linux Distros Unpatched Vulnerability : CVE-2023-2295), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (260139) and EUVD (EUVD-2023-33801). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 260139
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-2295

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/26/2023 🔍
05/18/2023 +22 days 🔍
05/18/2023 +0 days 🔍
12/17/2025 +944 days 🔍

Sourcesinfo

Advisory: RHSA-2023:3107
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-2295 (🔍)
GCVE (CVE): GCVE-0-2023-2295
GCVE (VulDB): GCVE-100-229287
EUVD: 🔍

Entryinfo

Created: 05/18/2023 08:57
Updated: 12/17/2025 23:48
Changes: 05/18/2023 08:57 (40), 06/10/2023 12:42 (11), 01/22/2025 21:18 (26), 09/01/2025 19:48 (2), 12/17/2025 23:48 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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