CVE-2023-5981

Gnutls: timing side-channel in the rsa-psk authentication

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.

Se encontró una vulnerabilidad en la que los tiempos de respuesta a textos cifrados con formato incorrecto en RSA-PSK ClientKeyExchange difieren de los tiempos de respuesta de textos cifrados con el relleno PKCS#1 v1.5 correcto.

USN-6499-1 fixed vulnerabilities in GnuTLS. This update provides the corresponding update for Ubuntu 18.04 LTS. It was discovered that GnuTLS had a timing side-channel when handling certain RSA-PSK key exchanges. A remote attacker could possibly use this issue to recover sensitive information.

*Credits: This issue was discovered by Daiki Ueno (Red Hat).

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-11-07 CVE Reserved
2023-11-16 CVE Published
2024-11-23 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-203: Observable Discrepancy

CAPEC

References (13)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2024/01/19/3
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7ZEIOLORQ7N6WRPFXZSYDL2MC4LP7VFV
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNXKVR5YNUEBNHAHM5GSYKBZX4W2HMN2

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2024:0155	2024-07-08
https://access.redhat.com/errata/RHSA-2024:0319	2024-07-08
https://access.redhat.com/errata/RHSA-2024:0399	2024-07-08
https://access.redhat.com/errata/RHSA-2024:0451	2024-07-08
https://access.redhat.com/errata/RHSA-2024:0533	2024-07-08
https://access.redhat.com/errata/RHSA-2024:1383	2024-07-08
https://access.redhat.com/errata/RHSA-2024:2094	2024-07-08
https://access.redhat.com/security/cve/CVE-2023-5981	2024-05-01
https://bugzilla.redhat.com/show_bug.cgi?id=2248445	2024-05-01
https://gnutls.org/security-new.html#GNUTLS-SA-2023-10-23	2024-07-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"		Gnutls Search vendor "Gnu" for product "Gnutls"				1.5.0 Search vendor "Gnu" for product "Gnutls" and version "1.5.0"		-		Affected
Redhat Search vendor "Redhat"		Linux Search vendor "Redhat" for product "Linux"				8.0 Search vendor "Redhat" for product "Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Linux Search vendor "Redhat" for product "Linux"				9.0 Search vendor "Redhat" for product "Linux" and version "9.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected