CVE-2023-45802: Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST
First published: Fri Oct 13 2023(Updated: )
The initial Rapid-Reset fix for mod_http2 was not sufficient to mitigate reset attacks completely; there is still a potential resource leak. If reset requests are sent on a connection below the rate limit imposed by nghttp2, memory is still consumed per RST and persists until the connection is broken. This "slow drip" of <1000 RST per second is sufficient to disable a single connection.
Credit: security@apache.org security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apache HTTP server | <2.4.58 | |
| Fedoraproject Fedora | =38 | |
| ubuntu/apache2 | <2.4.41-4ubuntu3.15 | 2.4.41-4ubuntu3.15 |
| ubuntu/apache2 | <2.4.52-1ubuntu4.7 | 2.4.52-1ubuntu4.7 |
| ubuntu/apache2 | <2.4.55-1ubuntu2.1 | 2.4.55-1ubuntu2.1 |
| ubuntu/apache2 | <2.4.57-2ubuntu2.1 | 2.4.57-2ubuntu2.1 |
| ubuntu/apache2 | <2.4.58-1 | 2.4.58-1 |
| debian/apache2 | <=2.4.38-3+deb10u8<=2.4.38-3+deb10u10<=2.4.56-1~deb11u2<=2.4.57-2 | 2.4.59-1~deb11u1 2.4.59-1~deb12u1 2.4.58-1 2.4.59-1 |
| >=2.4.17<2.4.58 | ||
| =37 | ||
| =38 | ||
| =39 | ||
| =10.0 |
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Reference Links
- https://httpd.apache.org/security/vulnerabilities_24.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/
- https://launchpad.net/bugs/cve/CVE-2023-45802
- https://www.openwall.com/lists/oss-security/2023/10/19/6
- https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2023-45802
- https://github.com/icing/blog/blob/main/h2-rapid-reset.md#cve-2023-45802
- https://ubuntu.com/security/notices/USN-6506-1
- https://www.cve.org/CVERecord?id=CVE-2023-45802
- https://nvd.nist.gov/vuln/detail/CVE-2023-45802
- https://security-tracker.debian.org/tracker/CVE-2023-45802
- https://github.com/apache/httpd/commit/decce82a706abd78dfc32821a03ad93841d7758a
- https://github.com/apache/httpd/commit/3c6caeb2dc865bd08bf53a06844efe2f8c8c70bb
- https://ubuntu.com/security/CVE-2023-45802
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2245071
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2245070
- https://access.redhat.com/errata/RHSA-2023:7625
- https://access.redhat.com/errata/RHSA-2023:7626
- https://access.redhat.com/errata/RHSA-2024:2368
- https://access.redhat.com/errata/RHSA-2024:2891
- https://access.redhat.com/errata/RHSA-2024:3121
- https://bugzilla.redhat.com/show_bug.cgi?id=2243877
- https://lists.debian.org/debian-lts-announce/2024/05/msg00013.html
Frequently Asked Questions
What is the severity of CVE-2023-45802?
The severity of CVE-2023-45802 is medium with a severity value of 5.9.
What is the affected software for CVE-2023-45802?
The affected software for CVE-2023-45802 is Apache HTTP server version up to exclusive 2.4.58 and Fedora version 38.
How can I fix CVE-2023-45802?
To fix CVE-2023-45802, update your Apache HTTP server to a version higher than 2.4.58 or apply relevant security patches for Fedora version 38.
What is the Common Weakness Enumeration (CWE) for CVE-2023-45802?
The Common Weakness Enumeration (CWE) for CVE-2023-45802 is CWE-400.
Where can I find more information about CVE-2023-45802?
More information about CVE-2023-45802 can be found at the following references: [link1](https://httpd.apache.org/security/vulnerabilities_24.html), [link2](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BFQD3KUEMFBHPAPBGLWQC34L4OWL5HAZ/), [link3](https://security.netapp.com/advisory/ntap-20231027-0011/).
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