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Ubuntu Security Notice USN-3627-2

Ubuntu Security Notice USN-3627-2
Posted May 2, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3627-2 - USN-3627-1 fixed vulnerabilities in Apache HTTP Server. This update provides the corresponding updates for Ubuntu 18.04 LTS. Alex Nichols and Jakob Hirsch discovered that the Apache HTTP Server mod_authnz_ldap module incorrectly handled missing charset encoding headers. A remote attacker could possibly use this issue to cause the server to crash, resulting in a denial of service. Elar Lang discovered that the Apache HTTP Server incorrectly handled certain characters specified in <FilesMatch>. A remote attacker could possibly use this issue to upload certain files, contrary to expectations. Various other issues were also addressed.

tags | advisory, remote, web, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-15710, CVE-2017-15715, CVE-2018-1283, CVE-2018-1301, CVE-2018-1303, CVE-2018-1312
SHA-256 | 426961a7e7de624743bc08149bc427aa7d8f0cecb8a76f8c654be69e82e0fc7d

Ubuntu Security Notice USN-3627-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3627-2
April 30, 2018

apache2 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

USN-3627-1 fixed vulnerabilities in Apache HTTP Server. This update
provides the corresponding updates for Ubuntu 18.04 LTS.

Original advisory details:

Alex Nichols and Jakob Hirsch discovered that the Apache HTTP Server
mod_authnz_ldap module incorrectly handled missing charset encoding
headers. A remote attacker could possibly use this issue to cause the
server to crash, resulting in a denial of service. (CVE-2017-15710)
Elar Lang discovered that the Apache HTTP Server incorrectly handled
certain characters specified in <FilesMatch>. A remote attacker could
possibly use this issue to upload certain files, contrary to expectations.
(CVE-2017-15715)
It was discovered that the Apache HTTP Server mod_session module
incorrectly handled certain headers. A remote attacker could possibly use
this issue to influence session data. (CVE-2018-1283)
Robert Swiecki discovered that the Apache HTTP Server incorrectly handled
certain requests. A remote attacker could possibly use this issue to cause
the server to crash, leading to a denial of service. (CVE-2018-1301)
Robert Swiecki discovered that the Apache HTTP Server mod_cache_socache
module incorrectly handled certain headers. A remote attacker could
possibly use this issue to cause the server to crash, leading to a denial
of service. (CVE-2018-1303)
Nicolas Daniels discovered that the Apache HTTP Server incorrectly
generated the nonce when creating HTTP Digest authentication challenges.
A remote attacker could possibly use this issue to replay HTTP requests
across a cluster of servers. (CVE-2018-1312)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
apache2-bin 2.4.29-1ubuntu4.1

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3627-2
https://usn.ubuntu.com/usn/usn-3627-1
CVE-2017-15710, CVE-2017-15715, CVE-2018-1283, CVE-2018-1301,
CVE-2018-1303, CVE-2018-1312

Package Information:
https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.1

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