OESA-2023-1806 (CVE-2023-31122)
Vulnerability from osv_openeuler – Published: 2023-11-10 11:06 – Updated: 2026-08-06 11:06 – Source websiteApache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.
Security Fix(es):
Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server: through 2.4.57.
(CVE-2023-31122)
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. (CVE-2023-45802)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"mod_md-2.4.43-23.oe1.aarch64.rpm",
"mod_ldap-2.4.43-23.oe1.aarch64.rpm",
"mod_proxy_html-2.4.43-23.oe1.aarch64.rpm",
"httpd-tools-2.4.43-23.oe1.aarch64.rpm",
"mod_ssl-2.4.43-23.oe1.aarch64.rpm",
"httpd-2.4.43-23.oe1.aarch64.rpm",
"httpd-debugsource-2.4.43-23.oe1.aarch64.rpm",
"httpd-debuginfo-2.4.43-23.oe1.aarch64.rpm",
"mod_session-2.4.43-23.oe1.aarch64.rpm",
"httpd-devel-2.4.43-23.oe1.aarch64.rpm"
],
"noarch": [
"httpd-help-2.4.43-23.oe1.noarch.rpm",
"httpd-filesystem-2.4.43-23.oe1.noarch.rpm"
],
"src": [
"httpd-2.4.43-23.oe1.src.rpm"
],
"x86_64": [
"httpd-tools-2.4.43-23.oe1.x86_64.rpm",
"httpd-devel-2.4.43-23.oe1.x86_64.rpm",
"mod_ldap-2.4.43-23.oe1.x86_64.rpm",
"mod_ssl-2.4.43-23.oe1.x86_64.rpm",
"mod_proxy_html-2.4.43-23.oe1.x86_64.rpm",
"httpd-debugsource-2.4.43-23.oe1.x86_64.rpm",
"mod_md-2.4.43-23.oe1.x86_64.rpm",
"mod_session-2.4.43-23.oe1.x86_64.rpm",
"httpd-2.4.43-23.oe1.x86_64.rpm",
"httpd-debuginfo-2.4.43-23.oe1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:20.03-LTS-SP1",
"name": "httpd",
"purl": "pkg:rpm/openEuler/httpd\u0026distro=openEuler-20.03-LTS-SP1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.43-23.oe1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "Critical"
},
"details": "Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.\r\n\r\nSecurity Fix(es):\r\n\r\nOut-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server: through 2.4.57.\r\n\r\n(CVE-2023-31122)\r\n\r\nWhen a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request\u0026apos;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.\r\n\r\nThis was found by the reporter during testing of\u00a0CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During \u0026quot;normal\u0026quot; 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.\r\n\r\nUsers are recommended to upgrade to version 2.4.58, which fixes the issue.\n(CVE-2023-45802)",
"id": "OESA-2023-1806",
"modified": "2026-08-06T11:06:15Z",
"published": "2023-11-10T11:06:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1806"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31122"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45802"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "httpd security update",
"upstream": [
"CVE-2023-31122",
"CVE-2023-45802"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.