Executive Summary

Title apache2 security update
Name DSA-4422 First vendor Publication 2019-04-03
Vendor Debian Last vendor Modification 2019-04-03
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


Several vulnerabilities have been found in the Apache HTTP server.


Gal Goldshtein of F5 Networks discovered a denial of service vulnerability in mod_http2. By sending malformed requests, the http/2 stream for that request unnecessarily occupied a server thread cleaning up incoming data, resulting in denial of service.


Diego Angulo from ImExHS discovered that mod_session_cookie does not respect expiry time.


Craig Young discovered that the http/2 request handling in mod_http2 could be made to access freed memory in string comparison when determining the method of a request and thus process the request incorrectly.


Charles Fol discovered a privilege escalation from the less-privileged child process to the parent process running as root.


A race condition in mod_auth_digest when running in a threaded server could allow a user with valid credentials to authenticate using another username, bypassing configured access control restrictions. The issue was discovered by Simon Kappel.


Bernhard Lorenz of Alpha Strike Labs GmbH reported that URL normalizations were inconsistently handled. When the path component of a request URL contains multiple consecutive slashes ('/'), directives such as LocationMatch and RewriteRule must account for duplicates in regular expressions while other aspects of the servers processing will implicitly collapse them.

For the stable distribution (stretch), these problems have been fixed in version 2.4.25-3+deb9u7.

This update also contains bug fixes that were scheduled for inclusion in the next stable point release. This includes a fix for a regression caused by a security fix in version 2.4.25-3+deb9u6.

We recommend that you upgrade your apache2 packages.

For the detailed security status of apache2 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/apache2

Original Source

Url : http://www.debian.org/security/2019/dsa-4422

CWE : Common Weakness Enumeration

% Id Name
33 % CWE-416 Use After Free
17 % CWE-706 Use of Incorrectly-Resolved Name or Reference
17 % CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
17 % CWE-384 Session Fixation
17 % CWE-362 Race Condition

CPE : Common Platform Enumeration

Application 251
Application 1
Application 1
Application 1
Application 2
Application 1
Application 2
Os 5
Os 2
Os 3
Os 1
Os 2
Os 1
Os 1
Os 1
Os 1

Alert History

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Date Informations
2019-06-12 05:21:45
  • Multiple Updates
2019-04-10 21:21:47
  • Multiple Updates
2019-04-09 05:21:22
  • Multiple Updates
2019-04-03 13:18:48
  • First insertion