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AUSCERT External Security Bulletin Redistribution
ESB-2019.3301.2
USN-4113-1: Apache HTTP Server vulnerabilities
18 September 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: apache2
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-10098 CVE-2019-10097 CVE-2019-10092
CVE-2019-10082 CVE-2019-10081 CVE-2019-9517
CVE-2019-0197
Reference: ESB-2019.3289
ESB-2019.3133
ESB-2019.1156
Original Bulletin:
https://usn.ubuntu.com/4113-1/
https://usn.ubuntu.com/4113-2/
Comment: This bulletin contains two (2) Ubuntu security advisories.
Revision History: September 18 2019: Vendor published USN-4113-2
to address a regression.
August 30 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4113-1: Apache HTTP Server vulnerabilities
29 August 2019
apache2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Apache.
Software Description
o apache2 - Apache HTTP server
Details
Stefan Eissing discovered that the HTTP/2 implementation in Apache did not
properly handle upgrade requests from HTTP/1.1 to HTTP/2 in some situations. A
remote attacker could use this to cause a denial of service (daemon crash).
This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.04. (CVE-2019-0197)
Craig Young discovered that a memory overwrite error existed in Apache when
performing HTTP/2 very early pushes in some situations. A remote attacker could
use this to cause a denial of service (daemon crash). This issue only affected
Ubuntu 18.04 LTS and Ubuntu 19.04. (CVE-2019-10081)
Craig Young discovered that a read-after-free error existed in the HTTP/2
implementation in Apache during connection shutdown. A remote attacker could
use this to possibly cause a denial of service (daemon crash) or possibly
expose sensitive information. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 19.04. (CVE-2019-10082)
Matei Badanoiu discovered that the mod_proxy component of Apache did not
properly filter URLs when reporting errors in some configurations. A remote
attacker could possibly use this issue to conduct cross-site scripting (XSS)
attacks. (CVE-2019-10092)
Daniel McCarney discovered that mod_remoteip component of Apache contained a
stack buffer overflow when parsing headers from a trusted intermediary proxy in
some situations. A remote attacker controlling a trusted proxy could use this
to cause a denial of service or possibly execute arbitrary code. This issue
only affected Ubuntu 19.04. (CVE-2019-10097)
Yukitsugu Sasaki discovered that the mod_rewrite component in Apache was
vulnerable to open redirects in some situations. A remote attacker could use
this to possibly expose sensitive information or bypass intended restrictions.
(CVE-2019-10098)
Jonathan Looney discovered that the HTTP/2 implementation in Apache did not
properly limit the amount of buffering for client connections in some
situations. A remote attacker could use this to cause a denial of service
(unresponsive daemon). This issue only affected Ubuntu 18.04 LTS and Ubuntu
19.04. (CVE-2019-9517)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
apache2 - 2.4.38-2ubuntu2.2
apache2-bin - 2.4.38-2ubuntu2.2
Ubuntu 18.04 LTS
apache2 - 2.4.29-1ubuntu4.10
apache2-bin - 2.4.29-1ubuntu4.10
Ubuntu 16.04 LTS
apache2 - 2.4.18-2ubuntu3.12
apache2-bin - 2.4.18-2ubuntu3.12
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-0197
o CVE-2019-10081
o CVE-2019-10082
o CVE-2019-10092
o CVE-2019-10097
o CVE-2019-10098
o CVE-2019-9517
- --------------------------------------------------------------------------------
USN-4113-2: Apache HTTP Server regression
17 September 2019
apache2 regression
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
USN-4113-1 introduced a regression in Apache.
Software Description
o apache2 - Apache HTTP server
Details
USN-4113-1 fixed vulnerabilities in the Apache HTTP server. Unfortunately, that
update introduced a regression when proxying balancer manager connections in
some configurations. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Stefan Eissing discovered that the HTTP/2 implementation in Apache did not
properly handle upgrade requests from HTTP/1.1 to HTTP/2 in some situations. A
remote attacker could use this to cause a denial of service (daemon crash).
This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.04. (CVE-2019-0197)
Craig Young discovered that a memory overwrite error existed in Apache when
performing HTTP/2 very early pushes in some situations. A remote attacker could
use this to cause a denial of service (daemon crash). This issue only affected
Ubuntu 18.04 LTS and Ubuntu 19.04. (CVE-2019-10081)
Craig Young discovered that a read-after-free error existed in the HTTP/2
implementation in Apache during connection shutdown. A remote attacker could
use this to possibly cause a denial of service (daemon crash) or possibly
expose sensitive information. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 19.04. (CVE-2019-10082)
Matei Badanoiu discovered that the mod_proxy component of Apache did not
properly filter URLs when reporting errors in some configurations. A remote
attacker could possibly use this issue to conduct cross-site scripting (XSS)
attacks. (CVE-2019-10092)
Daniel McCarney discovered that mod_remoteip component of Apache contained a
stack buffer overflow when parsing headers from a trusted intermediary proxy in
some situations. A remote attacker controlling a trusted proxy could use this
to cause a denial of service or possibly execute arbitrary code. This issue
only affected Ubuntu 19.04. (CVE-2019-10097)
Yukitsugu Sasaki discovered that the mod_rewrite component in Apache was
vulnerable to open redirects in some situations. A remote attacker could use
this to possibly expose sensitive information or bypass intended restrictions.
(CVE-2019-10098)
Jonathan Looney discovered that the HTTP/2 implementation in Apache did not
properly limit the amount of buffering for client connections in some
situations. A remote attacker could use this to cause a denial of service
(unresponsive daemon). This issue only affected Ubuntu 18.04 LTS and Ubuntu
19.04. (CVE-2019-9517)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
apache2 - 2.4.38-2ubuntu2.3
apache2-bin - 2.4.38-2ubuntu2.3
Ubuntu 18.04 LTS
apache2 - 2.4.29-1ubuntu4.11
apache2-bin - 2.4.29-1ubuntu4.11
Ubuntu 16.04 LTS
apache2 - 2.4.18-2ubuntu3.13
apache2-bin - 2.4.18-2ubuntu3.13
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-4113-1
o LP: 1842701
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