Ubuntu Security Notice USN-3937-2

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Ubuntu Security Notice USN-3937-2
April 10, 2019

apache2 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Apache.

Software Description:
– apache2: Apache HTTP server

Details:

USN-3937-1 and USN-3627-1 fixed several vulnerabilities in Apache.
This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Simon Kappel discovered that the Apache HTTP Server mod_auth_digest
module incorrectly handled threads. A remote attacker with valid
credentials could possibly use this issue to authenticate using
another username, bypassing access control restrictions.
(CVE-2019-0217)

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)

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)

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 12.04 ESM:
apache2.2-bin 2.2.22-1ubuntu1.15

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

References:
https://usn.ubuntu.com/usn/usn-3937-2
https://usn.ubuntu.com/usn/usn-3937-1
CVE-2017-15710, CVE-2018-1301, CVE-2018-1312, CVE-2019-0217