CVE-2023-45802

EUVD-2023-50091

23.10.2023, 07:15

When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that.

This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out.

Users are recommended to upgrade to version 2.4.58, which fixes the issue.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	5.9 MEDIUM	NETWORK	HIGH	NONE	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 82%

Affected Products (NVD)

Vendor	Product	Version
apache	http_server	2.4.17 ≤ 𝑥 < 2.4.58
debian	debian_linux	10.0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

apache2

bookworm	2.4.62-1~deb12u2 fixed
bookworm (security)	2.4.62-1~deb12u2 fixed
bullseye	2.4.62-1~deb11u1 fixed
bullseye (security)	2.4.62-1~deb11u2 fixed
sid	2.4.62-3 fixed
trixie	2.4.62-3 fixed

Ubuntu Releases

Ubuntu Product

Codename

apache2

bionic	needs-triage
focal	Fixed 2.4.41-4ubuntu3.15 released
jammy	Fixed 2.4.52-1ubuntu4.7 released
lunar	Fixed 2.4.55-1ubuntu2.1 released
mantic	Fixed 2.4.57-2ubuntu2.1 released
noble	Fixed 2.4.58-1ubuntu1 released
oracular	Fixed 2.4.58-1ubuntu1 released
trusty	not-affected
xenial	not-affected

Common Weakness Enumeration

CWE-404 - Improper Resource Shutdown or Release
The program does not release or incorrectly releases a resource before it is made available for re-use.

References

https://httpd.apache.org/security/vulnerabilities_24.html

https://lists.debian.org/debian-lts-announce/2024/05/msg00013.html

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2MBEPPC36UBVOZZNAXFHKLFGSLCMN5LI/

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BFQD3KUEMFBHPAPBGLWQC34L4OWL5HAZ/

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WE2I52RHNNU42PX6NZ2RBUHSFFJ2LVZX/

https://security.netapp.com/advisory/ntap-20231027-0011/