Debian DSA-3896-1 : apache2 - security update

critical Nessus Plugin ID 101013
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been found in the Apache HTTPD server.

- CVE-2017-3167 Emmanuel Dreyfus reported that the use of ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may lead to authentication requirements being bypassed.

- CVE-2017-3169 Vasileios Panopoulos of AdNovum Informatik AG discovered that mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port leading to a denial of service.

- CVE-2017-7659 Robert Swiecki reported that a specially crafted HTTP/2 request could cause mod_http2 to dereference a NULL pointer and crash the server process.

- CVE-2017-7668 Javier Jimenez reported that the HTTP strict parsing contains a flaw leading to a buffer overread in ap_find_token(). A remote attacker can take advantage of this flaw by carefully crafting a sequence of request headers to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.

- CVE-2017-7679 ChenQin and Hanno Boeck reported that mod_mime can read one byte past the end of a buffer when sending a malicious Content-Type response header.

Solution

Upgrade the apache2 packages.

For the oldstable distribution (jessie), these problems have been fixed in version 2.4.10-10+deb8u9. The oldstable distribution (jessie) is not affected by CVE-2017-7659.

For the stable distribution (stretch), these problems have been fixed in version 2.4.25-3+deb9u1.

See Also

https://security-tracker.debian.org/tracker/CVE-2017-3167

https://security-tracker.debian.org/tracker/CVE-2017-3169

https://security-tracker.debian.org/tracker/CVE-2017-7659

https://security-tracker.debian.org/tracker/CVE-2017-7668

https://security-tracker.debian.org/tracker/CVE-2017-7679

https://security-tracker.debian.org/tracker/CVE-2017-7659

https://packages.debian.org/source/jessie/apache2

https://packages.debian.org/source/stretch/apache2

https://www.debian.org/security/2017/dsa-3896

Plugin Details

Severity: Critical

ID: 101013

File Name: debian_DSA-3896.nasl

Version: 3.14

Type: local

Agent: unix

Published: 6/23/2017

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:apache2, cpe:/o:debian:debian_linux:8.0, cpe:/o:debian:debian_linux:9.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2017

Reference Information

CVE: CVE-2017-3167, CVE-2017-3169, CVE-2017-7659, CVE-2017-7668, CVE-2017-7679

DSA: 3896