7.5

CVE-2023-31122: Apache HTTP Server: mod_macro buffer over-read

Analyzed
AliasesALPINE-CVE-2023-31122SUSE-SU-2023:4430-1SUSE-SU-2023:4431-1
Published 23-10-2023Last modified 13-02-2025

Vulnerability summary

CVE-2023-31122 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in apache software foundation apache http server. EPSS estimates a 3.04% chance of exploitation in the next 30 days, higher than 87.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
3.04%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 3
DLA-3818-1DSA-5662-1MGASA-2023-0304OPENSUSE-SU-2024:13350-1RHSA-2024:1316RHSA-2024:3121

Timeline

  1. 23-10-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server: through 2.4.57.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

3.04%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 3.00% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse25 products
  • apache2-tls13&distro=SUSE Linux Enterprise Server 12 SP5< 2.4.51-35.35.1
  • apache2-tls13&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5< 2.4.51-35.35.1
  • apache2-tls13&distro=SUSE Linux Enterprise Software Development Kit 12 SP5< 2.4.51-35.35.1
  • apache2&distro=SUSE Enterprise Storage 7.1< 2.4.51-150200.3.59.1
  • apache2&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 2.4.33-150000.3.78.1
Redhat20 products
  • httpd< 0:2.4.57-8.el9
  • httpd-core< 0:2.4.57-8.el9
  • httpd-core-debuginfo< 0:2.4.57-8.el9
  • httpd-debuginfo< 0:2.4.57-8.el9
  • httpd-debugsource< 0:2.4.57-8.el9
Debian2 products
Opensuse2 products
  • apache2&distro=openSUSE Leap 15.4< 2.4.51-150400.6.14.1
  • apache2&distro=openSUSE Leap 15.5< 2.4.51-150400.6.14.1
Alpine1 product
  • apache2< 2.4.58-r0
Apache1 product
Apache software foundation1 product
Fedoraproject1 product
Ubuntu1 product
  • apache2< 2.4.41-4ubuntu3.15 | < 2.4.52-1ubuntu4.7 | < 2.4.7-1ubuntu4.22+esm9 | < 2.4.18-2ubuntu3.17+esm11 | < 2.4.29-1ubuntu4.27+esm1

9 vendors · 54 products

References

31 links
Show all 31 references