OESA-2023-1161 (CVE-2023-27522)
Vulnerability from osv_openeuler – Published: 2023-03-17 11:05 – Updated: 2026-08-06 11:05 – Source websiteApache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.
Security Fix(es):
HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.(CVE-2023-27522)
Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like: RewriteEngine on RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/ http://example.com:8080/ Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.(CVE-2023-25690)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"mod_md-2.4.43-21.oe1.aarch64.rpm",
"httpd-devel-2.4.43-21.oe1.aarch64.rpm",
"mod_session-2.4.43-21.oe1.aarch64.rpm",
"mod_ssl-2.4.43-21.oe1.aarch64.rpm",
"httpd-tools-2.4.43-21.oe1.aarch64.rpm",
"httpd-debugsource-2.4.43-21.oe1.aarch64.rpm",
"mod_ldap-2.4.43-21.oe1.aarch64.rpm",
"httpd-2.4.43-21.oe1.aarch64.rpm",
"mod_proxy_html-2.4.43-21.oe1.aarch64.rpm",
"httpd-debuginfo-2.4.43-21.oe1.aarch64.rpm"
],
"noarch": [
"httpd-filesystem-2.4.43-21.oe1.noarch.rpm",
"httpd-help-2.4.43-21.oe1.noarch.rpm"
],
"src": [
"httpd-2.4.43-21.oe1.src.rpm"
],
"x86_64": [
"httpd-debuginfo-2.4.43-21.oe1.x86_64.rpm",
"httpd-tools-2.4.43-21.oe1.x86_64.rpm",
"httpd-devel-2.4.43-21.oe1.x86_64.rpm",
"mod_ssl-2.4.43-21.oe1.x86_64.rpm",
"mod_proxy_html-2.4.43-21.oe1.x86_64.rpm",
"mod_session-2.4.43-21.oe1.x86_64.rpm",
"mod_ldap-2.4.43-21.oe1.x86_64.rpm",
"httpd-2.4.43-21.oe1.x86_64.rpm",
"httpd-debugsource-2.4.43-21.oe1.x86_64.rpm",
"mod_md-2.4.43-21.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": "2.4.43-21.oe1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"mod_md-2.4.43-21.oe1.aarch64.rpm",
"httpd-2.4.43-21.oe1.aarch64.rpm",
"httpd-devel-2.4.43-21.oe1.aarch64.rpm",
"httpd-tools-2.4.43-21.oe1.aarch64.rpm",
"mod_ldap-2.4.43-21.oe1.aarch64.rpm",
"httpd-debugsource-2.4.43-21.oe1.aarch64.rpm",
"mod_proxy_html-2.4.43-21.oe1.aarch64.rpm",
"mod_session-2.4.43-21.oe1.aarch64.rpm",
"httpd-debuginfo-2.4.43-21.oe1.aarch64.rpm",
"mod_ssl-2.4.43-21.oe1.aarch64.rpm"
],
"noarch": [
"httpd-help-2.4.43-21.oe1.noarch.rpm",
"httpd-filesystem-2.4.43-21.oe1.noarch.rpm"
],
"src": [
"httpd-2.4.43-21.oe1.src.rpm"
],
"x86_64": [
"mod_proxy_html-2.4.43-21.oe1.x86_64.rpm",
"httpd-2.4.43-21.oe1.x86_64.rpm",
"httpd-tools-2.4.43-21.oe1.x86_64.rpm",
"httpd-debugsource-2.4.43-21.oe1.x86_64.rpm",
"mod_ldap-2.4.43-21.oe1.x86_64.rpm",
"mod_session-2.4.43-21.oe1.x86_64.rpm",
"httpd-debuginfo-2.4.43-21.oe1.x86_64.rpm",
"mod_md-2.4.43-21.oe1.x86_64.rpm",
"mod_ssl-2.4.43-21.oe1.x86_64.rpm",
"httpd-devel-2.4.43-21.oe1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:20.03-LTS-SP3",
"name": "httpd",
"purl": "pkg:rpm/openEuler/httpd\u0026distro=openEuler-20.03-LTS-SP3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.43-21.oe1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"httpd-debuginfo-2.4.51-15.oe2203.aarch64.rpm",
"httpd-tools-2.4.51-15.oe2203.aarch64.rpm",
"httpd-debugsource-2.4.51-15.oe2203.aarch64.rpm",
"mod_ssl-2.4.51-15.oe2203.aarch64.rpm",
"mod_proxy_html-2.4.51-15.oe2203.aarch64.rpm",
"mod_ldap-2.4.51-15.oe2203.aarch64.rpm",
"mod_md-2.4.51-15.oe2203.aarch64.rpm",
"httpd-2.4.51-15.oe2203.aarch64.rpm",
"httpd-devel-2.4.51-15.oe2203.aarch64.rpm",
"mod_session-2.4.51-15.oe2203.aarch64.rpm",
"mod_proxy_html-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_md-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_ssl-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-devel-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-debuginfo-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_session-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-debugsource-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_ldap-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-tools-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-2.4.51-15.oe2203sp1.aarch64.rpm"
],
"noarch": [
"httpd-help-2.4.51-15.oe2203.noarch.rpm",
"httpd-filesystem-2.4.51-15.oe2203.noarch.rpm",
"httpd-filesystem-2.4.51-15.oe2203sp1.noarch.rpm",
"httpd-help-2.4.51-15.oe2203sp1.noarch.rpm"
],
"src": [
"httpd-2.4.51-15.oe2203.src.rpm",
"httpd-2.4.51-15.oe2203sp1.src.rpm"
],
"x86_64": [
"mod_proxy_html-2.4.51-15.oe2203.x86_64.rpm",
"httpd-devel-2.4.51-15.oe2203.x86_64.rpm",
"httpd-2.4.51-15.oe2203.x86_64.rpm",
"httpd-debuginfo-2.4.51-15.oe2203.x86_64.rpm",
"mod_ssl-2.4.51-15.oe2203.x86_64.rpm",
"mod_session-2.4.51-15.oe2203.x86_64.rpm",
"mod_md-2.4.51-15.oe2203.x86_64.rpm",
"mod_ldap-2.4.51-15.oe2203.x86_64.rpm",
"httpd-tools-2.4.51-15.oe2203.x86_64.rpm",
"httpd-debugsource-2.4.51-15.oe2203.x86_64.rpm",
"mod_md-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-devel-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_session-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-debuginfo-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-debugsource-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_ldap-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_proxy_html-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_ssl-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-tools-2.4.51-15.oe2203sp1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:22.03-LTS",
"name": "httpd",
"purl": "pkg:rpm/openEuler/httpd\u0026distro=openEuler-22.03-LTS"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.51-15.oe2203sp1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"mod_proxy_html-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_md-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_ssl-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-devel-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-debuginfo-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_session-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-debugsource-2.4.51-15.oe2203sp1.aarch64.rpm",
"mod_ldap-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-tools-2.4.51-15.oe2203sp1.aarch64.rpm",
"httpd-2.4.51-15.oe2203sp1.aarch64.rpm"
],
"noarch": [
"httpd-filesystem-2.4.51-15.oe2203sp1.noarch.rpm",
"httpd-help-2.4.51-15.oe2203sp1.noarch.rpm"
],
"src": [
"httpd-2.4.51-15.oe2203sp1.src.rpm"
],
"x86_64": [
"mod_md-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-devel-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_session-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-debuginfo-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-debugsource-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_ldap-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_proxy_html-2.4.51-15.oe2203sp1.x86_64.rpm",
"mod_ssl-2.4.51-15.oe2203sp1.x86_64.rpm",
"httpd-tools-2.4.51-15.oe2203sp1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:22.03-LTS-SP1",
"name": "httpd",
"purl": "pkg:rpm/openEuler/httpd\u0026distro=openEuler-22.03-LTS-SP1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.51-15.oe2203sp1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "High"
},
"details": "Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.\r\n\r\nSecurity Fix(es):\r\n\r\nHTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.(CVE-2023-27522)\r\n\r\nSome mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like: RewriteEngine on RewriteRule \u0026quot;^/here/(.*)\u0026quot; \u0026quot;http://example.com:8080/elsewhere?$1\u0026quot;; [P] ProxyPassReverse /here/ http://example.com:8080/ Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.(CVE-2023-25690)",
"id": "OESA-2023-1161",
"modified": "2026-08-06T11:05:38Z",
"published": "2023-03-17T11:05:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1161"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27522"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-25690"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "httpd security update",
"upstream": [
"CVE-2023-27522",
"CVE-2023-25690"
]
}
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.
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