Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : Apache HTTP Server regression (USN-4113-2) (Internal Data Buffering)

critical Nessus Plugin ID 128993
New! Plugin Severity Now Using CVSS v3

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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

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.

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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected apache2 and / or apache2-bin packages.

See Also

https://usn.ubuntu.com/4113-2/

Plugin Details

Severity: Critical

ID: 128993

File Name: ubuntu_USN-4113-2.nasl

Version: 1.4

Type: local

Agent: unix

Published: 9/18/2019

Updated: 9/17/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-10082

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:*:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:18.04:-:lts:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:apache2-bin:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:apache2:*:*:*:*:*:*:*

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/17/2019

Vulnerability Publication Date: 6/11/2019

Reference Information

CVE: CVE-2019-9517, CVE-2019-10081, CVE-2019-10082, CVE-2019-10097, CVE-2019-10092, CVE-2019-10098, CVE-2019-0197

USN: 4113-2