5.6

CVE-2018-16868: gnu gnutls Observable Discrepancy

CVSS: 5.6v3.1MediumModified
AliasesMGASA-2019-0103SUSE-SU-2019:1351-1SUSE-SU-2019:1351-2
Published 03-12-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-16868 is a medium (CVSS 5.6) Observable Discrepancy vulnerability in gnu gnutls. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.4% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.6/10
010
Medium · v3.1 (NVD)
EPSS score
0.58%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2019:1353-1SUSE-SU-2019:1121-1

Timeline

  1. 03-12-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

CVSS metrics

7 scores · 4 sources · 3 versions

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

0.00 pp

From 0.58% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.58%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse3 products
  • gnutls&distro=SUSE Linux Enterprise Module for Basesystem 15< 3.6.7-6.11.1
  • gnutls&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 3.6.7-6.11.1
  • gnutls&distro=SUSE Linux Enterprise Module for Desktop Applications 15< 3.6.7-6.11.1
Opensuse2 products
  • gnutls&distro=openSUSE Leap 15.0< 3.6.7-lp151.2.3.1
  • gnutls&distro=openSUSE Leap 15.1< 3.6.7-lp151.2.3.1
Ubuntu2 products
  • gnutls26All versions (No fix recorded)
  • gnutls28All versions (No fix recorded)
[unknown]1 product
Debian1 product
  • gnutls28< 3.6.5-2
Gnu1 product
Mageia1 product
  • gnutls< 3.5.13-1.2.mga6

7 vendors · 11 products

References

17 links
Show all 17 references