Summary
Apache Software Foundation heeft meerdere kwetsbaarheden verholpen in Apache HTTP Server.
Details
Interpretaties
De kwetsbaarheden betreffen verschillende modules en functionaliteiten binnen Apache HTTP Server. De meest ernstige kwetsbaarheid betreft een double free in de HTTP/2-implementatie, die het voor een aanvaller mogelijk maakt om willekeurige code uit te voeren voorafgaand aan authenticatie.
Lokale .htaccess auteurs kunnen via een privilege-escalatie toegang krijgen tot bestanden met httpd-gebruikersrechten. Het mod_proxy_ajp module bevat een heap-based buffer overflow en een out-of-bounds read, waardoor geheugenbeschadiging kan optreden. In de mod_md module is een resource allocatieprobleem aanwezig dat de serverprestaties kan beïnvloeden. De mod_dav_lock module bevat een NULL pointer dereference die kan leiden tot servercrashes en daarmee denial of service. De mod_auth_digest module kent een timing attack die Digest authenticatie kan omzeilen. De mod_authn_socache module heeft een NULL pointer dereference die crashes veroorzaakt bij caching forward proxy configuraties. Verder is er een HTTP response splitting kwetsbaarheid die manipulatie van HTTP headers mogelijk maakt. Daarnaast is er een improper null termination en out-of-bounds read in de core server functionaliteit, en een buffer over-read die kan leiden tot informatielekken of instabiliteit.
Oplossingen
Apache Software Foundation heeft versie 2.4.67 uitgebracht waarin alle genoemde kwetsbaarheden zijn verholpen. Zie bijgevoegde referenties voor meer informatie.
Vulnerabilities 11
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Critical 9.8
Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header()
Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after…
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High 8.8
Apache HTTP Server: http2: double free and possible RCE on early reset
Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
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High 8.8CVE-2026-24072 Public exploit
Apache HTTP Server: mod_rewrite elevation of privileges via ap_expr
An escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier allows local .htaccess authors to read files with the privileges of the httpd user. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
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High 7.5
Apache HTTP Server: mod_dav_lock indirect lock crash
A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs. The only known use-case for mod_dav_lock was m…
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High 7.5
Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_parse_data()
Buffer Over-read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
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High 7.3
Apache HTTP Server: mod_md unrestricted OCSP response
Allocation of Resources Without Limits or Throttling vulnerability in Apache HTTP Server's mod_md via OCSP response data. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the i…
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Medium 6.5
Apache HTTP Server: multiple modules: HTTP response splitting forwarding malicious status line
HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers. This issue affects Apache HTTP Server: from through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
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Medium 5.3
Apache HTTP Server: mod_authn_socache crash
A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration. Users are recommended to upgrade to version 2.4.67, which fix…
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Medium 5.3
Apache HTTP Server: Off-by-one OOB reads in AJP getter functions
Out-of-bounds Read vulnerability in mod_proxy_ajp of Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
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Medium 5.3
Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string)
Improper Null Termination, Out-of-bounds Read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
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Medium 4.8CVE-2026-33006 Public exploit
Apache HTTP Server: mod_auth_digest timing attack
A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Revision history
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#1.0.0
Initiele versie
References
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Reference
https://httpd.apache.org/security/vulnerabilities_24.html