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01 Record

CVE-2023-45802

Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST

UnratedPUBLISHEDCNA: apache
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
3.16% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 87.8% of scored records. A rank, not a probability.
NVD base score
5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-10-23 06:50Z3 YR AGO
Last updated
2024-10-14 09:01Z2 YR AGO
Reserved
2023-10-13
Assigning CNA
apache
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-404Improper Resource Shutdown or ReleaseClass
  • CWE-400Uncontrolled Resource ConsumptionClass
Data version
5.1
Document digest
05c13da9648fe266cee5027f1d7059e431c84ea4e7844868c2d7d03992d5537b

05 Affected products

VendorProductVersionsPlatforms
Apache Software FoundationApache HTTP Server2.4.17 to 2.4.57—

06 References

07 Fixed in

AlmaLinux 8

  • httpd
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-devel
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-filesystem
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-manual
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-tools
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_http2
    Fixed in 1.15.7-10.module_el8.10.0+3832+564e7653
  • mod_ldap
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_md
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
    • Affected before 1:2.0.8-8.module_el8.6.0+3031+fb177b09
  • mod_proxy_html
    Fixed in 1:2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_session
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_ssl
    Fixed in 1:2.4.37-64.module_el8.10.0+3761+75f8c656

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • mod_http2
    Fixed in 2.0.26-1.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • httpd
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-devel
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-filesystem
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-manual
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • httpd-tools
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_http2
    Fixed in 1.15.7-10.module_el8.10.0+3832+564e7653
  • mod_ldap
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_md
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
    • Affected before 1:2.0.8-8.module_el8.6.0+3031+fb177b09
  • mod_proxy_html
    Fixed in 1:2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_session
    Fixed in 2.4.37-64.module_el8.10.0+3761+75f8c656
  • mod_ssl
    Fixed in 1:2.4.37-64.module_el8.10.0+3761+75f8c656

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • mod_http2
    Fixed in 2.0.26-1.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • apache2
    Fixed in 2.4.59-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • apache2
    Fixed in 2.4.58-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • apache2
    Fixed in 2.4.58-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • apache2
    Fixed in 2.4.41-4ubuntu3.15

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • apache2
    Fixed in 2.4.52-1ubuntu4.7

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • apache2
    Fixed in 2.4.58-1ubuntu1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • apache2
    Fixed in 2.4.29-1ubuntu4.27+esm7
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.