CVE-2017-3169

In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port.

In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port.

In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port.

mod_sessioncrypto was encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This made it vulnerable to padding oracle attacks, particularly with CBC (CVE-2016-0736).

Malicious input to mod_auth_digest will cause the server to crash, and each instance continues to crash even for subsequently valid requests (CVE-2016-2161).

Emmanuel Dreyfus reported that the use of ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may lead to authentication requirements being bypassed (CVE-2017-3167).

Vasileios Panopoulos of AdNovum Informatik AG discovered that mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port leading to a denial of service (CVE-2017-3169).

Javier Jimenez reported that the HTTP strict parsing contains a flaw leading to a buffer overread in ap_find_token(). A remote attacker can take advantage of this flaw by carefully crafting a sequence of request headers to cause a segmentation fault, or to force ap_find_token() to return an incorrect value (CVE-2017-7668).

ChenQin and Hanno Boeck reported that mod_mime can read one byte past the end of a buffer when sending a malicious Content-Type response header (CVE-2017-7679).

Robert Swiecki reported that mod_auth_digest does not properly initialize or reset the value placeholder in [Proxy-]Authorization headers of type "Digest" between successive key=value assignments, leading to information disclosure or denial of service (CVE-2017-9788).

Hanno Böck discovered that the Apache HTTP Server incorrectly handled Limit directives in .htaccess files. In certain configurations, a remote attacker could possibly use this issue to read arbitrary server memory, including sensitive information. This issue is known as Optionsbleed (CVE-2017-9798).

This update for apache2 provides the following fixes:

Security issues fixed:

• CVE-2017-3167: In Apache use of httpd ap_get_basic_auth_pw() outside of the authentication phase could lead to authentication requirements bypass (bsc#1045065)
• CVE-2017-3169: In mod_ssl may have a dereference NULL pointer issue which could lead to denial of service (bsc#1045062)
• CVE-2017-7679: In mod_mime can buffer over-read by 1 byte, potentially leading to a crash or information disclosure (bsc#1045060)

Non-Security issues fixed:

• Remove /usr/bin/http2 symlink only during apache2 package uninstall, not upgrade. (bsc#1041830)
• In gensslcert, use hostname when fqdn is too long. (bsc#1035829)

This update for apache2 provides the following fixes:

Security issues fixed:

• CVE-2017-9788: The value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. Providing an initial key with no '=' assignment could reflect the stale value of uninitialized pool memory used by the prior request, leading to leakage of potentially confidential information, and a segfault in other cases resulting in denial of service. (bsc#1048576)
• CVE-2017-7679: mod_mime could have read one byte past the end of a buffer when sending a malicious Content-Type response header leading to information leak or crash. (bsc#1045060)
• CVE-2017-3169: mod_ssl may have dereferenced a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port leading to crash. (bsc#1045062)
• CVE-2017-3167: Use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may have lead to authentication requirements being bypassed. (bsc#1045065)

Non-security issues fixed:

• Re-order cipher suites to keep exclusion list at the end. (bsc#1043484, bsc#1043607)
• Remove /usr/bin/http2 link only during apache2 package uninstall, not upgrade. (bsc#1041830)
• In gensslcert, use hostname when fqdn is too long. (bsc#1035829)

This update for apache2 fixes several issues.

These security issues were fixed:

• CVE-2017-9798: Prevent use-after-free use of memory that allowed for an information leak via OPTIONS (bsc#1058058)
• CVE-2017-9788: Uninitialized memory reflection in mod_auth_digest could have lead to leakage of potentially confidential information, and a segfault in other cases resulting in DoS (bsc#1048576).
• CVE-2017-7679: mod_mime could have read one byte past the end of a buffer when sending a malicious Content-Type response header (bsc#1045060).
• CVE-2017-3169: mod_ssl may dereferenced a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port allowing for DoS (bsc#1045062).
• CVE-2017-3167: Use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may have lead to authentication requirements being bypassed (bsc#1045065).

These non-security issues were fixed:

• remove /usr/bin/http2 symlink only during apache2 package uninstall, not upgrade (bsc#1041830)
• gensslcert: use hostname when fqdn is too long (bsc#1035829)
• add NotifyAccess=all to service file (bsc#980663)

This update for apache2 fixes the following issues:

• Allow disabling SNI on proxy connections using 'SetEnv proxy-disable-sni 1' in the configuration files. (bsc#1052830)
• Allow ECDH again in mod_ssl, it had been incorrectly disabled with the 2.2.34 update. (bsc#1064561)

Following security issue has been fixed:

• CVE-2017-9798: A use-after-free in the OPTIONS command could be used by attackers to disclose memory of the apache server process, when htaccess uses incorrect Limit statement. (bsc#1058058)

Additionally, references to the following security issues, fixed by the previous version-update of apache2 to Apache HTTPD 2.2.34 have been added:

• CVE-2017-7668: The HTTP strict parsing introduced a bug in token list parsing, which allowed ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may have be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value. (bsc#1045061)
• CVE-2017-3169: mod_ssl may have de-referenced a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port allowing for DoS. (bsc#1045062)
• CVE-2017-3167: Use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may have lead to authentication requirements being bypassed. (bsc#1045065)
• CVE-2017-7679: mod_mime could have read one byte past the end of a buffer when sending a malicious Content-Type response header. (bsc#1045060)

Emmanuel Dreyfus discovered that third-party modules using the ap_get_basic_auth_pw() function outside of the authentication phase may lead to authentication requirements being bypassed. This update adds a new ap_get_basic_auth_components() function for use by third-party modules. (CVE-2017-3167)

Vasileios Panopoulos discovered that the Apache mod_ssl module may crash when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port. (CVE-2017-3169)

Javier Jiménez discovered that the Apache HTTP Server incorrectly handled parsing certain requests. A remote attacker could possibly use this issue to cause the Apache HTTP Server to crash, resulting in a denial of service. (CVE-2017-7668)

ChenQin and Hanno Böck discovered that the Apache mod_mime module incorrectly handled certain Content-Type response headers. A remote attacker could possibly use this issue to cause the Apache HTTP Server to crash, resulting in a denial of service. (CVE-2017-7679)