Red Hat Enterprise Linux 8.6 Extended Update Support update for gnutls

Published: 2024-03-05

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-5981 CVE-2024-0553
CWE-ID	CWE-208
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions Operating systems & Components / Operating system package or component gnutls (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux for ARM 64 - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux Server - TUS Operating systems & Components / Operating system Red Hat Enterprise Linux for Power, little endian - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux for IBM z Systems - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux Server - AUS Operating systems & Components / Operating system Red Hat Enterprise Linux for x86_64 - Extended Update Support Operating systems & Components / Operating system
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information Exposure Through Timing Discrepancy

EUVDB-ID: #VU83316

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-5981

CWE-ID: CWE-208 - Information Exposure Through Timing Discrepancy

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform timing attack.

The vulnerability exists due to the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding. A remote attacker can perform timing sidechannel attack in RSA-PSK key exchange.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 8.6

Red Hat Enterprise Linux for ARM 64 - Extended Update Support: 8.6

Red Hat Enterprise Linux Server - TUS: 8.6

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 8.6

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 8.6

Red Hat Enterprise Linux Server - AUS: 8.6

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.6

gnutls (Red Hat package): before 3.6.16-5.el8_6.3

CPE2.3

External links

https://access.redhat.com/errata/RHSA-2024:1108

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Information Exposure Through Timing Discrepancy

EUVDB-ID: #VU85623