USN-4113-1: Apache HTTP Server vulnerabilities
apache2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Apache.
Software Description
- 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.
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