CVE-2019-10097

In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients.

In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients.

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

The following packages have been upgraded to a later upstream version: mod_http2 (1.15.7). (BZ#1814236)

Security Fix(es):

• httpd: memory corruption on early pushes (CVE-2019-10081)

• httpd: read-after-free in h2 connection shutdown (CVE-2019-10082)

• httpd: null-pointer dereference in mod_remoteip (CVE-2019-10097)

• httpd: mod_rewrite configurations vulnerable to open redirect (CVE-2020-1927)

• httpd: mod_http2: DoS via slow, unneeded request bodies (CVE-2018-17189)

• httpd: mod_http2: read-after-free on a string compare (CVE-2019-0196)

• httpd: mod_http2: possible crash on late upgrade (CVE-2019-0197)

• httpd: limited cross-site scripting in mod_proxy error page (CVE-2019-10092)

• httpd: mod_rewrite potential open redirect (CVE-2019-10098)

• httpd: mod_proxy_ftp use of uninitialized value (CVE-2020-1934)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.3 Release Notes linked from the References section.

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

The following packages have been upgraded to a later upstream version: mod_http2 (1.15.7). (BZ#1814236)

Security Fix(es):

• httpd: memory corruption on early pushes (CVE-2019-10081)

• httpd: read-after-free in h2 connection shutdown (CVE-2019-10082)

• httpd: null-pointer dereference in mod_remoteip (CVE-2019-10097)

• httpd: mod_rewrite configurations vulnerable to open redirect (CVE-2020-1927)

• httpd: mod_http2: DoS via slow, unneeded request bodies (CVE-2018-17189)

• httpd: mod_http2: read-after-free on a string compare (CVE-2019-0196)

• httpd: mod_http2: possible crash on late upgrade (CVE-2019-0197)

• httpd: limited cross-site scripting in mod_proxy error page (CVE-2019-10092)

• httpd: mod_rewrite potential open redirect (CVE-2019-10098)

• httpd: mod_proxy_ftp use of uninitialized value (CVE-2020-1934)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

The updated packages fix security vulnerabilities:

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both. (CVE-2019-9517)

HTTP/2 (2.4.20 through 2.4.39) very early pushes, for example configured with "H2PushResource", could lead to an overwrite of memory in the pushing request's pool, leading to crashes. The memory copied is that of the configured push link header values, not data supplied by the client. (CVE-2019-10081)

In Apache HTTP Server 2.4.18-2.4.39, using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection shutdown. (CVE-2019-10082)

In Apache HTTP Server 2.4.0-2.4.39, a limited cross-site scripting issue was reported affecting the mod_proxy error page. An attacker could cause the link on the error page to be malformed and instead point to a page of their choice. This would only be exploitable where a server was set up with proxying enabled but was misconfigured in such a way that the Proxy Error page was displayed. (CVE-2019-10092)

In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients. (CVE-2019-10097)

In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL. (CVE-2019-10098)

This update for apache2 fixes the following issues:

Security issues fixed:

• CVE-2019-9517: Fixed HTTP/2 implementations that are vulnerable to unconstrained interal data buffering (bsc#1145575).
• CVE-2019-10081: Fixed mod_http2 that is vulnerable to memory corruption on early pushes (bsc#1145742).
• CVE-2019-10082: Fixed mod_http2 that is vulnerable to read-after-free in h2 connection shutdown (bsc#1145741).
• CVE-2019-10092: Fixed limited cross-site scripting in mod_proxy (bsc#1145740).
• CVE-2019-10097: Fixed mod_remoteip stack buffer overflow and NULL pointer dereference (bsc#1145739).
• CVE-2019-10098: Fixed mod_rewrite configuration vulnerablility to open redirect (bsc#1145738).

This update was imported from the SUSE:SLE-15:Update update project.

These are all security issues fixed in the apache2-2.4.49-1.1 package on the GA media of openSUSE Tumbleweed.

This update for apache2 fixes the following issues:

Security issues fixed:

• CVE-2019-9517: Fixed HTTP/2 implementations that are vulnerable to unconstrained interal data buffering (bsc#1145575).
• CVE-2019-10081: Fixed mod_http2 that is vulnerable to memory corruption on early pushes (bsc#1145742).
• CVE-2019-10082: Fixed mod_http2 that is vulnerable to read-after-free in h2 connection shutdown (bsc#1145741).
• CVE-2019-10092: Fixed limited cross-site scripting in mod_proxy (bsc#1145740).
• CVE-2019-10097: Fixed mod_remoteip stack buffer overflow and NULL pointer dereference (bsc#1145739).
• CVE-2019-10098: Fixed mod_rewrite configuration vulnerablility to open redirect (bsc#1145738).