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GLSA-202007-21 : Libreswan: Denial of service

high Nessus Plugin ID 138944

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Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-202007-21 (Libreswan: Denial of service)

 As a result of a bug in handling certain bogus encrypted IKEv1, while building a log message that the packet has been dropped, a NULL pointer dereference causes Libreswan to crash and restart when it attempts to log the state name involved.
 Impact :

 An attacker could cause a possible Denial of Service condition.
 Workaround :

 There is no known workaround at this time.

Solution

All Libreswan users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-vpn/libreswan-3.32'

See Also

https://security.gentoo.org/glsa/202007-21

Plugin Details

Severity: High

ID: 138944

File Name: gentoo_GLSA-202007-21.nasl

Version: 1.3

Type: local

Published: 7/27/2020

Updated: 2/28/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2020-1763

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:libreswan, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/27/2020

Vulnerability Publication Date: 5/12/2020

Reference Information

CVE: CVE-2020-1763

GLSA: 202007-21