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No exploitation reportedFix available

CVE-2023-27522

No exploitation reported by the sources we read.

  • Published2023-03-07
  • Fixed in2.4.56
  • WeaknessCWE-444

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.

Timeline

dates in UTC
  1. 2023-03-0716:15CVE publishedNVD

Versions per branch

NVD · OSV · CISA-ADP
Apache HTTP Server
BranchAffectedFixed in
2.4≥ 2.4.30, < 2.4.562.4.56
2.4≥ 2.4.30, ≤ 2.4.55no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Unbit uwsgi
BranchAffectedFixed in
2.0< 2.0.222.0.22

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apache Software Foundation Apache HTTP Serverother versions: not affected
    Affected
    • ≥ 2.4.30, ≤ 2.4.55no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-09-08

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • apacheMageia:8all versions · fixed in 2.4.56-1.mga8
  • apache2Ubuntu:22.04:LTSall versions · fixed in 2.4.52-1ubuntu4.4
  • apache2Ubuntu:20.04:LTSall versions · fixed in 2.4.41-4ubuntu3.14
  • apache2Ubuntu:18.04:LTSall versions · fixed in 2.4.29-1ubuntu4.27
  • apache2SUSE:Manager Server 4.2all versions · fixed in 2.4.51-150200.3.56.1
  • apache2SUSE:Manager Proxy 4.2all versions · fixed in 2.4.51-150200.3.56.1
  • apache2SUSE:Linux Enterprise Software Development Kit 12 SP5all versions · fixed in 2.4.51-35.25.1
  • apache2SUSE:Linux Enterprise Server for SAP Applications 15 SP5all versions · fixed in 2.4.66-150400.6.57.1

87 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2023:4629 Red Hat Product Security27 products fixed

    Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 security update

  • RHSA-2023:4628 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 security update

Full record on NVD

Fix

  1. Update Apache HTTP Server to 2.4.56
  2. Vendor fix Red Hat Product Security RHSA-2023:4629 · 27 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2023:4628 · 1 productFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  4. Workaround from the vendor Red Hat Product Security RHSA-2023:4629 · 105 productsMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2023-03-07
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-vcph-37mh-fqrh

Frequently asked questions

What is CVE-2023-27522?

HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.

Is CVE-2023-27522 actively exploited?

Active exploitation of CVE-2023-27522 has not been confirmed. Its EPSS score was 2.1% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-27522?

CVE-2023-27522 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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