Debian Security Advisory

DSA-4757-1 apache2 -- security update

Date Reported:
31 Aug 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-1927, CVE-2020-1934, CVE-2020-9490, CVE-2020-11984, CVE-2020-11993.
More information:

Several vulnerabilities have been found in the Apache HTTPD server.

  • CVE-2020-1927

    Fabrice Perez reported that certain mod_rewrite configurations are prone to an open redirect.

  • CVE-2020-1934

    Chamal De Silva discovered that the mod_proxy_ftp module uses uninitialized memory when proxying to a malicious FTP backend.

  • CVE-2020-9490

    Felix Wilhelm discovered that a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request could cause a crash when the server actually tries to HTTP/2 PUSH a resource afterwards.

  • CVE-2020-11984

    Felix Wilhelm reported a buffer overflow flaw in the mod_proxy_uwsgi module which could result in information disclosure or potentially remote code execution.

  • CVE-2020-11993

    Felix Wilhelm reported that when trace/debug was enabled for the HTTP/2 module certain traffic edge patterns can cause logging statements on the wrong connection, causing concurrent use of memory pools.

For the stable distribution (buster), these problems have been fixed in version 2.4.38-3+deb10u4.

We recommend that you upgrade your apache2 packages.

For the detailed security status of apache2 please refer to its security tracker page at: