Summary
David Shoon discovered that the Apache HTTP Server mod_macro module
incorrectly handled certain memory operations. A remote attacker could
possibly use this issue to cause the server to crash, resulting in a denial
of service. (CVE-2023-31122)
Prof. Sven Dietrich, Isa Jafarov, Prof. Heejo Lee, and Choongin Lee
discovered that the Apache HTTP Server incorrectly handled certain HTTP/2
connections. A remote attacker could possibly use this issue to cause the
server to consume resources, leading to a denial of service. This issue
only affected Ubuntu 23.04, and Ubuntu 23.10. (CVE-2023-43622)
Will Dormann and David Warren discovered that the Apache HTTP Server
incorrectly handled memory when handling HTTP/2 connections. A remote
attacker could possibly use this issue to cause the server to consume
resources, leading to a denial of service. (CVE-2023-45802)
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | apache2 | 2.4.41-4ubuntu3.15 |
| Ubuntu · 22.04 LTS 22.04:LTS | apache2 | 2.4.52-1ubuntu4.7 |
Vulnerabilities 3
-
Unscored —
Apache HTTP Server: mod_macro buffer over-read
Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server: through 2.4.57.
-
Unscored —
Apache HTTP Server: DoS in HTTP/2 with initial windows size 0
An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" a…
-
Unscored —CVE-2023-45802 Public exploit
Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST
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 t…