HTTP vulnerabilities

Apache httpd 1.3.37, 2.0.59, and 2.2.4 with the Prefork MPM module, allows local users to cause a denial of service by modifying the worker_score and process_score arrays to reference an arbitrary process ID, which is sent a SIGUSR1 signal from the master process, aka "SIGUSR1 killer."

Apache httpd 2.0.59 and 2.2.4, with the Prefork MPM module, allows local users to cause a denial of service via certain code sequences executed in a worker process that (1) stop request processing by killing all worker processes and preventing creation of replacements or (2) hang the system by forcing the master process to fork an arbitrarily large number of worker processes. NOTE: This might be an inherent design limitation of Apache with respect to worker processes in hosted environments.

The recall_headers function in mod_mem_cache in Apache 2.2.4 does not properly copy all levels of header data, which can cause Apache to return HTTP headers containing previously used data, which could be used by remote attackers to obtain potentially sensitive information.

suexec in Apache HTTP Server (httpd) 2.2.3 does not verify combinations of user and group IDs on the command line, which might allow local users to leverage other vulnerabilities to create arbitrary UID/GID owned files if /proc is mounted. NOTE: the researcher, who is reliable, claims that the vendor disputes the issue because "the attacks described rely on an insecure server configuration" in which the user "has write access to the document root." In addition, because this is dependent on other vulnerabilities, perhaps this is resultant and should not be included in CVE.

suexec in Apache HTTP Server (httpd) 2.2.3 uses a partial comparison for verifying whether the current directory is within the document root, which might allow local users to perform unauthorized operations on incorrect directories, as demonstrated using "html_backup" and "htmleditor" under an "html" directory. NOTE: the researcher, who is reliable, claims that the vendor disputes the issue because "the attacks described rely on an insecure server configuration" in which the user "has write access to the document root."

Multiple race conditions in suexec in Apache HTTP Server (httpd) 2.2.3 between directory and file validation, and their usage, allow local users to gain privileges and execute arbitrary code by renaming directories or performing symlink attacks. NOTE: the researcher, who is reliable, claims that the vendor disputes the issue because "the attacks described rely on an insecure server configuration" in which the user "has write access to the document root."

Directory traversal vulnerability in Apache HTTP Server and Tomcat 5.x before 5.5.22 and 6.x before 6.0.10, when using certain proxy modules (mod_proxy, mod_rewrite, mod_jk), allows remote attackers to read arbitrary files via a .. (dot dot) sequence with combinations of (1) "/" (slash), (2) "\" (backslash), and (3) URL-encoded backslash (%5C) characters in the URL, which are valid separators in Tomcat but not in Apache.

Unspecified vulnerability in Oracle HTTP Server 9.0.1.5, Application Server 9.0.4.2 and 10.1.2.0.0, and Collaboration Suite 9.0.4.2 has unknown impact and attack vectors related to the Oracle Process Mgmt & Notification component, aka OPMN02.

Multiple unspecified vulnerabilities in Oracle HTTP Server 9.0.1.5, 9.2.0.8, 10.1.0.5, and 10.2.0.3; Application Server 9.0.4.3, 10.1.2.0.0, 10.1.2.0.1, 10.1.2.0.2, 10.1.2.1, and 10.1.3.0; and Collaboration Suite 9.0.4.2 and 10.1.2; have unknown impact and attack vectors related to the Oracle HTTP Server, aka (1) OHS03 and (2) OHS04.

Unspecified vulnerability in Oracle HTTP Server 9.0.1.5, Application Server 9.0.4.3, 10.1.2.0.0, 10.1.2.0.2, and 10.1.2.2; and Collaboration Suite 9.0.4.2 and 10.1.2; has unknown impact and attack vectors related to the Oracle Process Mgmt & Notification component, aka OPMN01. NOTE: as of 20070123, Oracle has not disputed claims by a reliable researcher that OPMN01 is for a buffer overflow in Oracle Notification Service (ONS).

Multiple unspecified vulnerabilities in Oracle HTTP Server 9.2.0.8 and Oracle E-Business Suite and Applications 11.5.10CU2 have unknown impact and attack vectors, aka (1) OHS01, (2) OHS02, (3) OHS05, (4) OHS06, and (5) OHS07.

The Apache HTTP Server, when accessed through a TCP connection with a large window size, allows remote attackers to cause a denial of service (network bandwidth consumption) via a Range header that specifies multiple copies of the same fragment. NOTE: the severity of this issue has been disputed by third parties, who state that the large window size required by the attack is not normally supported or configured by the server, or that a DDoS-style attack would accomplish the same goal

Unspecified vulnerability in Oracle HTTP Server 9.2.0.7 and 10.1.0.5, Application Server 9.0.4.3, 10.1.2.0.2, 10.1.2.1.0, and 10.1.3.0, racle Collaboration Suite 9.0.4.2 and 10.1.2, and Oracle E-Business Suite and Applications 11.5.10CU2 has unknown impact and remote attack vectors, aka Vuln# OHS06.

Unspecified vulnerability in Oracle HTTP Server 9.2.0.7 and Oracle E-Business Suite and Applications 11.5.10CU2 has unknown impact and local attack vectors, aka Vuln# OHS08.

Unspecified vulnerability in Oracle HTTP Server 9.2.0.7, when running on HP Tru64 UNIX, has unknown impact and remote attack vectors related to HTTPS and SSL, aka Vuln# OHS07.

Unspecified vulnerability in Oracle HTTP Server 9.2.0.7, Oracle Collaboration Suite 9.0.4.2, and Oracle E-Business Suite and Applications 11.5.10CU2 has unknown impact and remote attack vectors related to HTTPS and SSL, aka Vuln# OHS05.

Unspecified vulnerability in Oracle HTTP Server 9.2.0.7 and Oracle Collaboration Suite 9.0.4.2 has unknown impact and remote attack vectors related to HTTPS and SSL, aka Vuln# OHS04.

Unspecified vulnerability in Oracle HTTP Server 9.2.0.7, as used in Oracle Collaboration Suite 9.0.4.2 and Oracle E-Business Suite and Applications 11.5.10CU2, has unknown impact and remote attack vectors related to htdigest, aka Vuln# OHS02.

Format string vulnerability in the mod_tcl module 1.0 for Apache 2.x allows context-dependent attackers to execute arbitrary code via format string specifiers that are not properly handled in a set_var function call in (1) tcl_cmds.c and (2) tcl_core.c.

Apache 2.2.2, when running on Windows, allows remote attackers to read source code of CGI programs via a request that contains uppercase (or alternate case) characters that bypass the case-sensitive ScriptAlias directive, but allow access to the file on case-insensitive file systems.

Off-by-one error in the ldap scheme handling in the Rewrite module (mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before 2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted URLs that are not properly handled using certain rewrite rules.

http_protocol.c in (1) IBM HTTP Server 6.0 before 6.0.2.13 and 6.1 before 6.1.0.1, and (2) Apache HTTP Server 1.3 before 1.3.35, 2.0 before 2.0.58, and 2.2 before 2.2.2, does not sanitize the Expect header from an HTTP request when it is reflected back in an error message, which might allow cross-site scripting (XSS) style attacks using web client components that can send arbitrary headers in requests, as demonstrated using a Flash SWF file.

Unspecified vulnerability in Oracle PL/SQL (PLSQL), as used in Database Server DS 9.2.0.7 and 10.1.0.5, Application Server 1.0.2.2, 9.0.4.2, 10.1.2.0.2, 10.1.2.1.0, and 10.1.3.0.0, E-Business Suite and Applications 11.5.10, and Collaboration Suite 10.1.1, 10.1.2.0, 10.1.2.1, and 9.0.4.2, allows attackers to bypass the PLSQLExclusion list and access excluded packages and procedures, aka Vuln# PLSQL01.

Buffer overflow in the HP HTTP Server 5.0 through 5.95 of the HP Web-enabled Management Software allows remote attackers to execute arbitrary code via unknown vectors.

mod_ssl in Apache 2.0 up to 2.0.55, when configured with an SSL vhost with access control and a custom error 400 error page, allows remote attackers to cause a denial of service (application crash) via a non-SSL request to an SSL port, which triggers a NULL pointer dereference.

Cross-site scripting (XSS) vulnerability in the mod_imap module of Apache httpd before 1.3.35-dev and Apache httpd 2.0.x before 2.0.56-dev allows remote attackers to inject arbitrary web script or HTML via the Referer when using image maps.

Memory leak in the worker MPM (worker.c) for Apache 2, in certain circumstances, allows remote attackers to cause a denial of service (memory consumption) via aborted connections, which prevents the memory for the transaction pool from being reused for other connections.

ssl_engine_kernel.c in mod_ssl before 2.8.24, when using "SSLVerifyClient optional" in the global virtual host configuration, does not properly enforce "SSLVerifyClient require" in a per-location context, which allows remote attackers to bypass intended access restrictions.

The byte-range filter in Apache 2.0 before 2.0.54 allows remote attackers to cause a denial of service (memory consumption) via an HTTP header with a large Range field.

Off-by-one error in the mod_ssl Certificate Revocation List (CRL) verification callback in Apache, when configured to use a CRL, allows remote attackers to cause a denial of service (child process crash) via a CRL that causes a buffer overflow of one null byte.

The Apache HTTP server before 1.3.34, and 2.0.x before 2.0.55, when acting as an HTTP proxy, allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a "Transfer-Encoding: chunked" header and a Content-Length header, which causes Apache to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka "HTTP Request Smuggling."

Buffer overflow in htdigest in Apache 2.0.52 may allow attackers to execute arbitrary code via a long realm argument. NOTE: since htdigest is normally only locally accessible and not setuid or setgid, there are few attack vectors which would lead to an escalation of privileges, unless htdigest is executed from a CGI program. Therefore this may not be a vulnerability.

Apache webserver 2.0.52 and earlier allows remote attackers to cause a denial of service (CPU consumption) via an HTTP GET request with a MIME header containing multiple lines with a large number of space characters.

Buffer overflow in the get_tag function in mod_include for Apache 1.3.x to 1.3.32 allows local users who can create SSI documents to execute arbitrary code as the apache user via SSI (XSSI) documents that trigger a length calculation error.

Apache HTTP Server 2.0.47 and earlier allows local users to bypass .htaccess file restrictions, as specified in httpd.conf with directives such as Deny From All, by using an ErrorDocument directive. NOTE: the vendor has disputed this issue, since the .htaccess mechanism is only intended to restrict external web access, and a local user already has the privileges to perform the same operations without using ErrorDocument

Multiple cross-site scripting (XSS) vulnerabilities in Oracle HTTP Server 1.3.22, based on Apache, allow remote attackers to execute arbitrary script as other users via the (1) action, (2) username, or (3) password parameters in an isqlplus request.

The check_forensic script in apache-utils package 1.3.31 allows local users to overwrite or create arbitrary files via a symlink attack on temporary files.

Unknown vulnerability in Apache 2.0.51 prevents "the merging of the Satisfy directive," which could allow attackers to obtain access to restricted resources contrary to the specified authentication configuration.

PHP 4.3.4 and earlier in Apache 1.x and 2.x (mod_php) can leak global variables between virtual hosts that are handled by the same Apache child process but have different settings, which could allow remote attackers to obtain sensitive information.

The mod_ssl module in Apache 2.0.35 through 2.0.52, when using the "SSLCipherSuite" directive in directory or location context, allows remote clients to bypass intended restrictions by using any cipher suite that is allowed by the virtual host configuration.

The IPv6 URI parsing routines in the apr-util library for Apache 2.0.50 and earlier allow remote attackers to cause a denial of service (child process crash) via a certain URI, as demonstrated using the Codenomicon HTTP Test Tool.

The char_buffer_read function in the mod_ssl module for Apache 2.x, when using reverse proxying to an SSL server, allows remote attackers to cause a denial of service (segmentation fault).

mod_ssl in Apache 2.0.50 and earlier allows remote attackers to cause a denial of service (CPU consumption) by aborting an SSL connection in a way that causes an Apache child process to enter an infinite loop.

Buffer overflow in Apache 2.0.50 and earlier allows local users to gain apache privileges via a .htaccess file that causes the overflow during expansion of environment variables.

The mod_dav module in Apache 2.0.50 and earlier allows remote attackers to cause a denial of service (child process crash) via a certain sequence of LOCK requests for a location that allows WebDAV authoring access.

The ap_get_mime_headers_core function in Apache httpd 2.0.49 allows remote attackers to cause a denial of service (memory exhaustion), and possibly an integer signedness error leading to a heap-based buffer overflow on 64 bit systems, via long header lines with large numbers of space or tab characters.

Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a denial of service (process crash) and possibly execute arbitrary code via a negative Content-Length HTTP header field, which causes a large amount of data to be copied.

Stack-based buffer overflow in the ssl_util_uuencode_binary function in ssl_util.c for Apache mod_ssl, when mod_ssl is configured to trust the issuing CA, may allow remote attackers to execute arbitrary code via a client certificate with a long subject DN.

Apache 1.4.x before 1.3.30, and 2.0.x before 2.0.49, when using multiple listening sockets on certain platforms, allows remote attackers to cause a denial of service (blocked new connections) via a "short-lived connection on a rarely-accessed listening socket."

Directory traversal vulnerability in Apache 1.3.29 and earlier, and Apache 2.0.48 and earlier, when running on Cygwin, allows remote attackers to read arbitrary files via a URL containing "..%5C" (dot dot encoded backslash) sequences.