CVE-2017-7679

CVE-2017-7679 affects Apache HTTP Server (httpd) mod_mime. A buffer over-read allows reading one byte past the end of a buffer when sending a malicious Content-Type header, potentially enabling a crash or memory access issues. Affected products include httpd 2.2.x before 2.2.33 and 2.4.x before 2...

CVE-2022-31813

CVE-2022-31813 affects Apache HTTP Server 2.4.53 and older; due to hop-by-hop handling, X-Forwarded-* headers may be dropped to the origin server, which can enable bypass of IP-based authentication. All connected advisories indicate the fix is in Apache HTTP Server 2.4.54 and related updates in d...

CVE-2019-0211

CVE-2019-0211 affects Apache HTTP Server 2.4.17–2.4.38 when using MPM event, worker, or prefork. The issue arises from code executing in less-privileged child processes/threads (including in-process scripting interpreters) that could be exploited to run arbitrary code with the privileges of the p...

CVE-2020-11984

CVE-2020-11984 affects Apache HTTP Server mod_proxy_uwsgi. Based on the provided documents, it is a vulnerability in httpd’s uwsgi handling that can lead to information disclosure and potentially remote code execution. The vulnerability was reported for Apache HTTP Server versions around 2.4.32 t...

CVE-2022-23943

CVE-2022-23943 is an out-of-bounds write vulnerability in httpd’s mod_sed that could allow memory corruption by attacker-supplied data. Affected: Apache HTTP Server 2.4.52 and earlier. Mitigation: upgrade to a fixed release (e.g., httpd 2.4.53 or later) as indicated by multiple advisories (includ...

CVE-2024-38476

CVE-2024-38476 concerns Apache HTTP Server 2.4.59 and earlier where backend applications emitting malicious or exploitable response headers can lead to information disclosure, SSRF, or local script execution via internal redirects. The connected advisories confirm the issue affects httpd/core beh...

CVE-2023-25690

CVE-2023-25690 concerns Apache HTTP Server 2.4.0–2.4.55 with mod_proxy enabled when combined with certain RewriteRule or ProxyPassMatch patterns that re-insert user-supplied URL data into the proxied request-target via variable substitution. The underlying flaw enables HTTP request smuggling thro...

CVE-2022-22720

CVE-2022-22720 – Apache httpd HTTP Request Smuggling (details from connected docs) Affected software: Apache HTTP Server (httpd) versions 2.4.52 and earlier. Root cause / description: Inbound connections are not closed when errors occur while discarding the request body, which can expose the serv...

CVE-2017-3167

CVE-2017-3167 affects Apache httpd 2.2.x prior to 2.2.33 and 2.4.x prior to 2.4.26. The issue is that third‑party modules using ap_get_basic_auth_pw() outside the authentication phase can bypass authentication requirements. Connected sources confirm the impact and upstream fixes: update to httpd ...

CVE-2021-26691

CVE-2021-26691 affects Apache HTTP Server, where a crafted SessionHeader can cause a heap overflow in 2.4.0–2.4.46. Several connected advisories indicate that updates have been released (e.g., AlmaLinux/CentOS/Red Hat ecosystems) and that newer Apache HTTP Server versions (e.g., 2.4.51 in Check P...

CVE-2018-1312

CVE-2018-1312 affects Apache httpd 2.2.0–2.4.29 where nonce generation for HTTP Digest authentication was not seeded with a proper pseudo-random seed. This allowed replay across servers in a common Digest configuration. Public advisories (CentOS, Debian, Arch Linux, ALT Linux) fix confirmed in ve...

CVE-2021-44790

CVE-2021-44790 affects Apache HTTP Server up to version 2.4.51. It describes a buffer overflow in the mod_lua multipart parser (triggered via r:parsebody() from Lua scripts). Connected documents corroborate this in various advisories and patch notes, indicating releases with fixes (e.g., patched ...

CVE-2021-39275

CVE-2021-39275 affects Apache HTTP Server (httpd) up to 2.4.48 and earlier. The issue is an out-of-bounds write in ap_escape_quotes() when given malicious input, potentially crashing the server or enabling code execution in some environments. Several connected sources concur this vulnerability ex...

CVE-2017-7668

CVE-2017-7668: Apache httpd contains a buffer over-read in ap_find_token() caused by strict HTTP parsing changes in 2.2.32 and 2.4.24. A remote attacker can craft headers to crash the httpd process or have ap_find_token() return an incorrect value. Affected distributions have addressed this by up...

CVE-2010-0425

CVE-2010-0425 affects Apache HTTP Server on Windows with ISAPI module mod_isapi (DLLs in 2.0.37–2.0.63, 2.2.0–2.2.14, and 2.3.x before 2.3.7). Root cause: mod_isapi may unload an ISAPI DLL before request processing finishes, causing memory corruption. Impact: remote code execution or denial of se...

CVE-2017-3169

CVE-2017-3169 affects Apache HTTP Server (httpd) up to the fixed versions: 2.2.x before 2.2.33 and 2.4.x before 2.4.26. The vulnerability is a NULL pointer dereference in the httpd’s mod_ssl component when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS po...

CVE-2020-1927

CVE-2020-1927 affects Apache HTTP Server 2.4.0–2.4.41, where mod_rewrite redirects intended to be self-referential could be fooled by encoded newlines and redirect to an unexpected URL within the request. Multiple connected advisories confirm the issue and indicate that fixes were released in Apa...

CVE-2020-1934

CVE-2020-1934 affects Apache HTTP Server 2.4.0–2.4.41 via mod_proxy_ftp, which may use uninitialized memory when proxying to a malicious FTP backend. Public advisories confirm the fixes in Apache HTTP Server 2.4.43+ (e.g., ALAS-2020-1370/ALAS2-2020-1427), so upgrading to 2.4.43 or newer is the re...

CVE-2019-9517

CVE-2019-9517 describes an attack against some HTTP/2 implementations where unconstrained internal data buffering can cause a denial of service. The vulnerability arises when an attacker floods a connection with a large number of requests for a large response object while manipulating HTTP/2 flow...

CVE-2023-38709

CVE-2023-38709 describes HTTP response splitting in the core of Apache HTTP Server caused by faulty input validation. It affects Apache HTTP Server up to version 2.4.58; multiple advisories (e.g., Astra Linux, AlmaLinux, Alpine Linux) note that upgrading to 2.4.64 fixes the issue. Some sources in...

CVE-2017-15715

CVE-2017-15715 affects Apache HTTP Server 2.4.0–2.4.29. The issue: the expression could treat a trailing '$' as a newline in a malicious filename, bypassing filename-end checks and potentially allowing uploads that would otherwise be blocked. Documents consistently describe this as a bypass vuln...

CVE-2021-40438

CVE-2021-40438 is an SSRF flaw in Apache HTTP Server 2.4.x through older revisions where a crafted request URI path can cause mod_proxy to forward the request to an origin server chosen by the remote user. The issue affects Apache httpd 2.4.48 and earlier; the CVSSv3.1 base score is 9.0 (CRITICAL...

CVE-2019-0220

CVE-2019-0220 affects Apache HTTP Server 2.4.0–2.4.38. The issue arises when the path component of a request URL contains multiple consecutive slashes; directives like LocationMatch and RewriteRule must account for duplicates in regular expressions because the server may collapse or mishandle the...

CVE-2011-3192

CVE-2011-3192 is a DoS flaw in the Apache HTTP Server related to how Range headers are processed. In affected releases of httpd (1.3.x, 2.0.x up to 2.0.64, and 2.2.x up to 2.2.19), a remote attacker can trigger excessive memory and CPU usage by sending a Range header with multiple overlapping ran...

CVE-2024-39884

CVE-2024-39884 affects Apache HTTP Server (notably 2.4.60 and older) where legacy content-type based configuration (e.g., AddType) could cause source code disclosure for indirectly requested files, potentially exposing local content (e.g., PHP scripts being served). Affected vendors consistently ...

CVE-2024-24795

CVE-2024-24795 (httpd) describes HTTP response splitting in multiple Apache HTTP Server modules when malicious response headers can be injected into backend applications, enabling HTTP desynchronization. The vulnerability is mitigated by upgrading to Apache HTTP Server 2.4.59, as indicated across...

CVE-2019-10098

Apache httpd (2.4.0–2.4.39) is affected by CVE-2019-10098 via mod_rewrite: self-referential redirects can be fooled by encoded newlines, causing redirects to an unexpected URL. Connected advisories confirm affected versions and that exploitation could enable phishing via redirects. Mitigation is ...

CVE-2022-28615

CVE-2022-28615 affects Apache HTTP Server 2.4.53 and earlier, where a read beyond bounds can occur in ap_strcmp_match() when given a very large input buffer. The issue may affect third‑party modules or lua scripts that call this function. Advisories in connected documents reference an official fi...

CVE-2018-1283

In Apache httpd (mod_session) versions 2.4.0–2.4.29, when SessionEnv forwarding is enabled to CGI applications, a remote attacker can influence their content by sending a crafted Session header. This arises from mod_session forwarding data using the HTTP_SESSION variable name, which overlaps with...

CVE-2019-10082

CVE-2019-10082 affects Apache HTTP Server 2.4.18–2.4.39, where fuzzed network input could cause read-after-free in http/2 session shutdown. Impact: remote, unauthenticated triggering memory faults in httpd workers, enabling potential DoS and other consequences. Connected sources indicate remediat...

CVE-2019-0217

This CVE affects Apache HTTP Server 2.4.x up to 2.4.38, where a race condition in mod_auth_digest could allow an authenticated user to act as another user and bypass access control. The issue is tied to running in threaded MPMs; the underlying cause is a race condition in authentication handling....

CVE-2018-17199

In Apache HTTP Server 2.4.x up to 2.4.37, the vulnerability CVE-2018-17199 is caused by mod_session_cookie: the session expiry time is checked before decoding the session, so expiry is ignored for mod_session_cookie sessions. This means session expiry may not be enforced for affected sessions. Th...

CVE-2019-10092

The CVE-2019-10092 entry concerns Apache HTTP Server 2.4.0–2.4.39 with a limited cross-site scripting in the mod_proxy error page. The vulnerability lets an attacker craft a link on the error page that could mislead users by pointing to a page of the attacker’s choosing, but exploitation requires...

CVE-2017-9798

CVE-2017-9798 affects the Apache HTTP Server (httpd) up to 2.4.27 and 2.2.34. A use-after-free flaw in how httpd handles invalid/previously unregistered HTTP methods specified by the Limit directive (used in .htaccess or certain httpd.conf configurations) can allow a remote, unauthenticated attac...

CVE-2017-9788

Apache httpd vulnerability CVE-2017-9788 stems from mod_auth_digest not initializing or resetting the value placeholder in Digest Proxy-Authorization headers between key=value assignments, which can leak previous memory data or cause a segfault/DoS. Affected: httpd 2.2.34 and 2.4.x prior to 2.4.2...

CVE-2024-36387

CVE-2024-36387 affects the Apache httpd mod_http2 component: when serving WebSocket protocol upgrades over HTTP/2, it can trigger a NULL pointer dereference and crash the server, degrading performance (DoS). Connected advisories indicate patches across distributions (e.g., Debian security update ...

CVE-2020-9490

CVE-2020-9490 affects Apache HTTP Server versions 2.4.20–2.4.43. A specially crafted value for the Cache-Digest header in an HTTP/2 request could cause a crash when the server subsequently attempts to HTTP/2 PUSH a resource. Mitigation for unpatched servers is to disable HTTP/2 PUSH via H2Push of...

CVE-2016-8612

CVE-2016-8612 affects Apache HTTP Server mod_cluster prior to httpd 2.4.23, with a flaw in the protocol parsing logic of the load balancer that can cause a Segmentation Fault in the httpd process due to improper input validation. Exploitation details are not provided in the connected documents; r...

CVE-2016-4975

CVE-2016-4975: Apache HTTP Server is vulnerable to CRLF injection in mod_userdir causing HTTP response splitting. Affected: 2.4.1–2.4.23. Mitigation/fix: upgrade to Apache HTTP Server 2.4.25 (and 2.2.32 for the 2.2 line). The issue is resolved by changes that prohibit CR or LF injection into head...

CVE-2021-41773

CVE-2021-41773 is a path traversal vulnerability in Apache HTTP Server 2.4.49 affecting how path normalization maps URLs to files under Alias-like directives. The issue could allow access to files outside configured directories; if CGI scripts are enabled for those paths, remote code execution is...

CVE-2020-11993

CVE-2020-11993 affects Apache HTTP Server 2.4.20–2.4.43: when trace/debug is enabled for the HTTP/2 module and certain traffic patterns, logging can be performed on the wrong connection, leading to concurrent use of memory pools. Mitigation in public advisories: set LogLevel for mod_http2 above i...

CVE-2017-15710

The CVE-2017-15710 issue affects Apache httpd when mod_authnz_ldap is used with AuthLDAPCharsetConfig. A crafted Accept-Language header is looked up in a charset table; if not present, it is truncated to two characters, and values shorter than two characters trigger an out-of-bounds write of a NU...

CVE-2024-38474

CVE-2024-38474 affects Apache HTTP Server’s mod_rewrite: substitutions that capture and substitute unsafely can be mis-encoded, enabling unintended access paths. The issue is fixed by upgrading to Apache HTTP Server 2.4.60 (and related advisories note versions 2.4.61+ as subsequent fixes). Connec...

CVE-2024-27316

CVE-2024-27316 affects the mod_http2 component used with Apache httpd; the issue occurs when HTTP/2 headers exceed the configured limit, causing nghttp2 to buffer headers and potentially leading to memory exhaustion if the client continues sending headers. Connected sources identify affected pack...

CVE-2021-44224

CVE-2021-44224 concerns Apache HTTP Server (httpd) with the mod_proxy forward proxy configuration. A crafted URI to a forward proxy (ProxyRequests on) can trigger a NULL pointer dereference, causing a crash. In configurations that mix forward and reverse proxy declarations, it can enable requests...

CVE-2022-36760

CVE-2022-36760 affects Apache HTTP Server mod_proxy_ajp, enabling HTTP Request Smuggling by an attacker to forward requests to the AJP backend. Public docs confirm impact on Apache httpd 2.4.54 and earlier; remediation is to upgrade to a fixed release (e.g., httpd 2.4.55+ as referenced by advisor...

CVE-2007-6750

CVE-2007-6750 affects Apache HTTP Server 1.x and 2.x. The vulnerability arises from handling partial HTTP requests (Slowloris), related to absence of the mod_reqtimeout protection in versions before 2.2.15, enabling remote DoS (daemon outage). Public details in connected docs confirm PoCs/exploit...

CVE-2020-35452

The CVE-2020-35452 entry concerns Apache HTTP Server 2.4.0–2.4.46, where a specially crafted Digest nonce can trigger a stack overflow in mod_auth_digest. The description notes there was no reported exploit against Apache at the time, though certain compiler/compile options might enable it with l...

CVE-2022-22721

CVE-2022-22721 concerns the Apache HTTP Server. On 32-bit systems, if LimitXMLRequestBody is set to allow request bodies larger than 350 MB (default 1 MB), an integer overflow can occur, leading to out-of-bounds writes. Affected product: Apache HTTP Server 2.4.52 and earlier. Impact per sources: ...

CVE-2022-37436

CVE-2022-37436 affects Apache HTTP Server in versions prior to 2.4.55. The issue allows a malicious backend to truncate response headers early, causing some headers to be incorporated into the response body and preventing the later headers from being interpreted by the client. Affected products i...