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SUSE SLED15 / SLES15 Security Update : gnutls (SUSE-SU-2020:1584-1)

high Nessus Plugin ID 137607

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Synopsis

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

Description

This update for gnutls fixes the following issues :

CVE-2020-13777: Fixed an insecure session ticket key construction which could have made the TLS server to not bind the session ticket encryption key with a value supplied by the application until the initial key rotation, allowing an attacker to bypass authentication in TLS 1.3 and recover previous conversations in TLS 1.2 (bsc#1172506).

Fixed an improper handling of certificate chain with cross-signed intermediate CA certificates (bsc#1172461).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server for SAP 15 :

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-2020-1584=1

SUSE Linux Enterprise Server 15-LTSS :

zypper in -t patch SUSE-SLE-Product-SLES-15-2020-1584=1

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2020-1584=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-1584=1

SUSE Linux Enterprise High Performance Computing 15-LTSS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2020-1584=1

SUSE Linux Enterprise High Performance Computing 15-ESPOS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2020-1584=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1172461

https://bugzilla.suse.com/show_bug.cgi?id=1172506

https://www.suse.com/security/cve/CVE-2020-13777/

http://www.nessus.org/u?1e9bac7c

Plugin Details

Severity: High

ID: 137607

File Name: suse_SU-2020-1584-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/18/2020

Updated: 3/6/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2020-13777

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:gnutls-debugsource, p-cpe:/a:novell:suse_linux:libgnutls30-hmac, p-cpe:/a:novell:suse_linux:libgnutls30-32bit-debuginfo, p-cpe:/a:novell:suse_linux:libgnutls30, p-cpe:/a:novell:suse_linux:libgnutlsxx-devel, p-cpe:/a:novell:suse_linux:libgnutlsxx28-debuginfo, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:libgnutls-devel, p-cpe:/a:novell:suse_linux:gnutls-debuginfo, p-cpe:/a:novell:suse_linux:gnutls, p-cpe:/a:novell:suse_linux:libgnutlsxx28, p-cpe:/a:novell:suse_linux:libgnutls30-debuginfo

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: 6/9/2020

Vulnerability Publication Date: 6/4/2020

Reference Information

CVE: CVE-2020-13777