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Fencer Vulns
high 7.5

CVE-2024-23837 json

LibHTP unbounded folded header handling leads to denial service

published 2024-02-26 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-21279

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

LibHTP is a security-aware parser for the HTTP protocol. Crafted traffic can cause excessive processing time of HTTP headers, leading to denial of service. This issue is addressed in 0.5.46.

Patch / fix

  • OISF libhtp 0.5.46
  • libhtp Debian 12 1:0.5.42-1+deb12u1
  • libhtp Debian 13 1:0.5.46-1

debian advisories DEBIAN-CVE-2024-23837

  • libhtp Ubuntu Pro 16.04 LTS 0.5.15-1ubuntu0.1~esm1
  • libhtp Ubuntu Pro 18.04 LTS 1:0.5.26-1ubuntu0.1~esm1
  • libhtp Ubuntu Pro 20.04 LTS 1:0.5.32-1ubuntu0.1~esm1
  • libhtp Ubuntu Pro 22.04 LTS 1:0.5.39-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2024-23837

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libhtp openSUSE Tumbleweed 0.5.46-1.1
  • libhtp Package Hub 15 SP6, Package Hub 15 SP5, openSUSE Leap 15.6 +1 more 0.5.42-bp156.3.3.1

opensuse advisories openSUSE-SU-2024:13706-1openSUSE-SU-2024:0150-1openSUSE-SU-2024:0150-2

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • OISF libhtp
  • fedoraproject fedora

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.