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VPR Score: 6.7
Synopsis
The remote Debian host is missing a security-related update.
Description
Several vulnerabilities have been found in the Apache HTTPD server.
- CVE-2019-9517 Jonathan Looney reported that a malicious client could perform a denial of service attack (exhausting h2 workers) by flooding a connection with requests and basically never reading responses on the TCP connection.
- CVE-2019-10081 Craig Young reported that HTTP/2 PUSHes could lead to an overwrite of memory in the pushing request's pool, leading to crashes.
- CVE-2019-10082 Craig Young reported that the HTTP/2 session handling could be made to read memory after being freed, during connection shutdown.
- CVE-2019-10092 Matei 'Mal' Badanoiu reported a limited cross-site scripting vulnerability in the mod_proxy error page.
- CVE-2019-10097 Daniel McCarney reported that 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 issue does not affect the stretch release.
- CVE-2019-10098 Yukitsugu Sasaki reported a potential open redirect vulnerability in the mod_rewrite module.
Solution
Upgrade the apache2 packages.
For the oldstable distribution (stretch), these problems have been fixed in version 2.4.25-3+deb9u8.
For the stable distribution (buster), these problems have been fixed in version 2.4.38-3+deb10u1.