7.4

CVE-2023-0361: debian debian_linux Observable Discrepancy

CVSS: 7.4v3.1HighModified
AliasesALPINE-CVE-2023-0361MGASA-2023-0067SUSE-SU-2023:0475-1
Published 15-02-2023Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2023-0361 is a high (CVSS 7.4) Observable Discrepancy vulnerability in debian debian_linux. EPSS estimates a 1.45% chance of exploitation in the next 30 days, higher than 73% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
1.45%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
SUSE-SU-2023:4952-1SUSE-SU-2024:1179-1

Timeline

  1. 15-02-2023
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

1.45%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

+0.04 pp

From 1.42% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (gitlab.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Redhat11 products
  • enterprise_linux8.0 | 9.0
  • gnutls< 0:3.7.6-18.el9_1 | < 0:3.7.6-18.el9_0 | < 0:3.6.16-6.el8_7 | < 0:3.6.16-5.el8_6.1
  • gnutls-c++< 0:3.7.6-18.el9_1 | < 0:3.7.6-18.el9_0 | < 0:3.6.16-6.el8_7 | < 0:3.6.16-5.el8_6.1
  • gnutls-c++-debuginfo< 0:3.7.6-18.el9_1 | < 0:3.7.6-18.el9_0 | < 0:3.6.16-6.el8_7 | < 0:3.6.16-5.el8_6.1
  • gnutls-dane< 0:3.7.6-18.el9_1 | < 0:3.7.6-18.el9_0 | < 0:3.6.16-6.el8_7 | < 0:3.6.16-5.el8_6.1
Suse4 products
  • gnutls&distro=SUSE Linux Enterprise Micro 5.1< 3.6.7-150200.14.25.2
  • gnutls&distro=SUSE Linux Enterprise Micro 5.2< 3.6.7-150200.14.25.2
  • gnutls&distro=SUSE Linux Enterprise Module for Basesystem 15 SP4< 3.7.3-150400.4.27.1
  • gnutls&distro=SUSE Linux Enterprise Real Time 15 SP3< 3.6.7-150200.14.25.2
Netapp3 products
Debian2 products
  • gnutls28< 3.7.1-5+deb11u3 | < 3.6.7-4+deb10u10 | < 3.7.8-5
  • debian_linuxEOL10.0
Opensuse2 products
  • gnutls&distro=openSUSE Leap 15.4< 3.7.3-150400.4.27.1
  • gnutls&distro=openSUSE Tumbleweed< 3.7.9-1.2
Alpine1 product
  • gnutls< 3.7.1-r2 | < 3.7.7-r1 | < 3.7.8-r3 | < 3.8.0-r0
Fedoraproject1 product
Gnu1 product
Mageia1 product
  • gnutls< 3.6.15-3.4.mga8
Ubuntu1 product
  • gnutls28All versions (No fix recorded) | < 3.6.13-2ubuntu1.8 | < 3.7.3-4ubuntu1.2

10 vendors · 27 products

References

43 links
Show all 43 references