CVE-2023-5981 — Observable Timing Discrepancy in Gnutls

CWE-208 — Observable Timing DiscrepancyCWE-203 — Observable Discrepancy12 documents9 sources
Severity
5.9MEDIUMNVD
EPSS
0.9%
top 24.06%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
GNU GnutlsDebian LinuxFedoraproject Fedora+1 more
Timeline
PublishedNov 28
Latest updateJul 15

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 2.2 | Impact: 3.6

Affected Packages2 packages

▶NVDgnu/gnutls< 3.8.2
▶NVDredhat/linux8.0, 9.0+1

Also affects: Debian Linux 10.0, Fedora 37, 38

🔴Vulnerability Details

3
GHSA
GHSA-jvj3-gqjm-cg8p: A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with↗2023-11-28
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OSV
CVE-2023-5981: A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with↗2023-11-28
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CVEList
Gnutls: timing side-channel in the rsa-psk authentication↗2023-11-28
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📋Vendor Advisories

8
Oracle
Oracle Oracle Communications Applications Risk Matrix: Installation (GnuTLS) — CVE-2023-5981↗2024-07-15
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Red Hat
gnutls: incomplete fix for CVE-2023-5981↗2024-01-16
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Microsoft
Gnutls: incomplete fix for cve-2023-5981↗2024-01-09
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Ubuntu
GnuTLS vulnerability↗2024-01-08
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Ubuntu
GnuTLS vulnerability↗2023-11-21
▶