SUSE update for gnutls

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

Update the affected package gnutls to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro: 5.4 - 5.5

openSUSE Leap Micro: 5.4

Basesystem Module: 15-SP4 - 15-SP5

SUSE Linux Enterprise Micro for Rancher: 5.4

SUSE Linux Enterprise Server for SAP Applications 15: SP4 - SP5

SUSE Linux Enterprise Server 15: SP4 - SP5

SUSE Linux Enterprise Real Time 15: SP4 - SP5

SUSE Linux Enterprise High Performance Computing 15: SP4 - SP5

SUSE Linux Enterprise Desktop 15: SP4 - SP5

openSUSE Leap: 15.4 - 15.5

SUSE Manager Retail Branch Server: 4.3

SUSE Manager Server: 4.3

SUSE Manager Proxy: 4.3

libgnutls30-64bit-debuginfo: before 3.7.3-150400.4.38.1

libgnutls-devel-64bit: before 3.7.3-150400.4.38.1

libgnutls30-hmac-64bit: before 3.7.3-150400.4.38.1

libgnutls30-64bit: before 3.7.3-150400.4.38.1

libgnutls30-hmac-32bit: before 3.7.3-150400.4.38.1

libgnutls30-32bit: before 3.7.3-150400.4.38.1

libgnutls30-32bit-debuginfo: before 3.7.3-150400.4.38.1

libgnutls-devel-32bit: before 3.7.3-150400.4.38.1

libgnutls30-debuginfo: before 3.7.3-150400.4.38.1

gnutls: before 3.7.3-150400.4.38.1

libgnutls-devel: before 3.7.3-150400.4.38.1

gnutls-guile: before 3.7.3-150400.4.38.1

gnutls-guile-debuginfo: before 3.7.3-150400.4.38.1

libgnutls30: before 3.7.3-150400.4.38.1

gnutls-debuginfo: before 3.7.3-150400.4.38.1

libgnutlsxx28-debuginfo: before 3.7.3-150400.4.38.1

libgnutls30-hmac: before 3.7.3-150400.4.38.1

gnutls-debugsource: before 3.7.3-150400.4.38.1

libgnutlsxx28: before 3.7.3-150400.4.38.1

libgnutlsxx-devel: before 3.7.3-150400.4.38.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap_micro:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:basesystem_module:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:basesystem_module:15-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_micro_for_rancher:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_15:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_15:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_real_time_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop_15:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap:15.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_proxy:4.3:*:*:*:*:*:*:*
• cpe:2.3:a:suse:libgnutls30-64bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls-devel-64bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-hmac-64bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-64bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-hmac-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-32bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls-devel-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:gnutls:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:gnutls-guile:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:gnutls-guile-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:gnutls-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutlsxx28-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutls30-hmac:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:gnutls-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutlsxx28:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libgnutlsxx-devel:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234983-1/

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.