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Debian LTS: Security Advisory for apache2 (DLA-2776-1)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'apache2' package(s) announced via the DLA-2776-1 advisory.
Insight
Insight
Several vulnerabilities were discovered in the Apache HTTP server. An attacker could send proxied requests to arbitrary servers, corrupt memory in some setups involving third-party modules, and cause the server to crash. CVE-2021-34798 Malformed requests may cause the server to dereference a NULL pointer. CVE-2021-39275 ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. CVE-2021-40438 A crafted request uri-path can cause mod_proxy to forward the request to an origin server chosen by the remote user.
Affected Software
Affected Software
'apache2' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For Debian 9 stretch, these problems have been fixed in version 2.4.25-3+deb9u11. We recommend that you upgrade your apache2 packages.