Debian Security Advisory DSA 4422-1 (apache2 - security update)

Published: 2019-04-06 02:00:17
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Summary:
The remote host is missing an update for the 'apache2' Linux Distribution Package(s) announced via the DSA-4422-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Several vulnerabilities have been found in the Apache HTTP server. CVE-2018-17189 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. CVE-2018-17199 Diego Angulo from ImExHS discovered that mod_session_cookie does not respect expiry time. CVE-2019-0196 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. CVE-2019-0211 Charles Fol discovered a privilege escalation from the less-privileged child process to the parent process running as root. CVE-2019-0217 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. CVE-2019-0220 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.

Affected Versions:
'apache2' Linux Distribution Package(s) on Debian Linux.

Recommendations:
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 Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2018-17189
https://nvd.nist.gov/vuln/detail/CVE-2018-17199
https://nvd.nist.gov/vuln/detail/CVE-2019-0196
https://nvd.nist.gov/vuln/detail/CVE-2019-0211
https://nvd.nist.gov/vuln/detail/CVE-2019-0217
https://nvd.nist.gov/vuln/detail/CVE-2019-0220

References:

https://www.debian.org/security/2019/dsa-4422.html
https://security-tracker.debian.org/tracker/DSA-4422-1

Severity
Medium
CVSS Score
5.0
Published
2019-04-06
Modified
2019-04-26
Category
Debian Local Security Checks

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