SUSE SLED15 / SLES15 Security Update : strongswan (SUSE-SU-2021:3467-1)

critical Nessus Plugin ID 154249
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3467-1 advisory.

- The gmp plugin in strongSwan before 5.9.4 has a remote integer overflow via a crafted certificate with an RSASSA-PSS signature. For example, this can be triggered by an unrelated self-signed CA certificate sent by an initiator. Remote code execution cannot occur. (CVE-2021-41990)

- The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility. (CVE-2021-41991)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1191367

https://bugzilla.suse.com/1191435

http://www.nessus.org/u?e643572a

https://www.suse.com/security/cve/CVE-2021-41990

https://www.suse.com/security/cve/CVE-2021-41991

Plugin Details

Severity: Critical

ID: 154249

File Name: suse_SU-2021-3467-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/20/2021

Updated: 10/20/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-41991

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:strongswan, p-cpe:/a:novell:suse_linux:strongswan-doc, p-cpe:/a:novell:suse_linux:strongswan-hmac, p-cpe:/a:novell:suse_linux:strongswan-ipsec, p-cpe:/a:novell:suse_linux:strongswan-libs0, p-cpe:/a:novell:suse_linux:strongswan-nm, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/19/2021

Vulnerability Publication Date: 10/18/2021

Reference Information

CVE: CVE-2021-41990, CVE-2021-41991

SuSE: SUSE-SU-2021:3467-1