7.5

CVE-2023-4408: fedoraproject fedora Inefficient Algorithmic Complexity

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2023-4408UBUNTU-CVE-2023-4408DEBIAN-CVE-2023-4408
Published 13-02-2024Last modified 14-03-2025
Open JSON

Vulnerability summary

CVE-2023-4408 is a high (CVSS 7.5) Inefficient Algorithmic Complexity vulnerability in fedoraproject fedora. EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 70.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.34%
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 25 · Related 10
DSA-5621-1MGASA-2024-0038OPENSUSE-SU-2024:13687-1RHSA-2024:1647RHSA-2024:1648RHSA-2024:1781

Timeline

  1. 13-02-2024
    PublishedVulnerability first disclosed.
  2. 14-03-2025
    Last modifiedVulnerability information updated.

Description

The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers. This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.34%

Chance of exploitation in the next 30 days

Percentile

71%

Versus all other CVEs

30-day change

0.00 pp

From 1.34% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.34%

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

Ubuntu3 products
  • bind9All versions (No fix recorded) | < 1:9.16.48-0ubuntu0.20.04.1 | < 1:9.18.18-0ubuntu0.22.04.2
  • bind9-libsAll versions (No fix recorded)
  • isc-dhcpAll versions (No fix recorded)
Isc2 products
  • bind≥ 9.0.0, ≤ 9.16.45 | ≥ 9.18.0, ≤ 9.18.21 | ≥ 9.19.0, ≤ 9.19.19 | 9.9.3:s1 | 9.16.8:s1 | 9.16.11:s1 | 9.16.12:s1 | 9.16.13:s1 | 9.16.14:s1 | 9.16.21:s1 | 9.16.32:s1 | 9.16.36:s1 | 9.16.43:s1 | 9.18.0:s1 | 9.18.11:s1 | 9.18.18:s1
  • bind 9≥ 9.0.0, ≤ 9.16.45 | ≥ 9.18.0, ≤ 9.18.21 | ≥ 9.19.0, ≤ 9.19.19 | ≥ 9.9.3-S1, ≤ 9.11.37-S1 | ≥ 9.16.8-S1, ≤ 9.16.45-S1 | ≥ 9.18.11-S1, ≤ 9.18.21-S1
Alpine1 product
  • bind≥ 9.0.0, < 9.16.48-r0 | ≥ 9.0.0, < 9.18.24-r0
Chainguard1 product
  • bind< 9.18.24-r0
Debian1 product
  • bind9< 1:9.18.24-1 | < 1:9.19.21-1
Fedoraproject1 product
Netapp1 product
Wolfi1 product
  • bind< 9.18.24-r0

8 vendors · 11 products

References

14 links
Show all 14 references