9.8

CVE-2023-39976: clusterlabs libqb Classic Buffer Overflow

CVSS: 9.8v3.1CriticalModified
AliasesMGASA-2023-0339SUSE-SU-2023:3727-1SUSE-SU-2023:3728-1
Published 08-08-2023Last modified 15-10-2024
Open JSON

Vulnerability summary

CVE-2023-39976 is a critical (CVSS 9.8) Classic Buffer Overflow vulnerability in clusterlabs libqb. EPSS estimates a 1.18% chance of exploitation in the next 30 days, higher than 67.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-08-2023
    PublishedVulnerability first disclosed.
  2. 15-10-2024
    Last modifiedVulnerability information updated.

Description

log_blackbox.c in libqb before 2.0.8 allows a buffer overflow via long log messages because the header size is not considered.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.18%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

0.00 pp

From 1.18% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.18%

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

Suse7 products
  • libqb&distro=SUSE Linux Enterprise High Availability Extension 15 SP1< 1.0.3+20190326.a521604-150100.3.9.1
  • libqb&distro=SUSE Linux Enterprise High Availability Extension 15 SP2< 1.0.3+20190326.a521604-150100.3.9.1
  • libqb&distro=SUSE Linux Enterprise High Availability Extension 15 SP3< 2.0.2+20201203.def947e-150300.3.6.1
  • libqb&distro=SUSE Linux Enterprise High Availability Extension 15 SP4< 2.0.4+20211112.a2691b9-150400.4.3.1
  • libqb&distro=SUSE Linux Enterprise High Availability Extension 15 SP5< 2.0.6+20220323.758044b-150500.3.3.1
Redhat6 products
  • doxygen2man-debuginfo< 0:2.0.3-12.el9_0 | < 0:2.0.6-4.el9_3 | < 0:2.0.6-3.el9_2
  • libqb< 0:2.0.3-12.el9_0 | < 0:2.0.6-4.el9_3 | < 0:2.0.6-3.el9_2
  • libqb-debuginfo< 0:2.0.3-12.el9_0 | < 0:2.0.6-4.el9_3 | < 0:2.0.6-3.el9_2
  • libqb-debugsource< 0:2.0.3-12.el9_0 | < 0:2.0.6-4.el9_3 | < 0:2.0.6-3.el9_2
  • libqb-devel< 0:2.0.3-12.el9_0 | < 0:2.0.6-4.el9_3 | < 0:2.0.6-3.el9_2
Opensuse2 products
  • libqb&distro=openSUSE Leap 15.4< 1.0.3+20190326.a521604-150100.3.9.1 | < 2.0.4+20211112.a2691b9-150400.4.3.1
  • libqb&distro=openSUSE Leap 15.5< 2.0.6+20220323.758044b-150500.3.3.1
Clusterlabs1 product
Debian1 product
  • libqbAll versions (No fix recorded) | < 2.0.8-1
Mageia1 product
  • libqb< 2.0.8-1.mga9
Ubuntu1 product
  • libqb< 2.0.4-1ubuntu0.2

7 vendors · 19 products

References

28 links
Show all 28 references