Amazon Linux AMI update for httpd

1) Input validation error

EUVDB-ID: #VU33821

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3183

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

Mitigation

Update the affected packages:

i686:
    httpd-devel-2.2.31-1.6.amzn1.i686
    mod_ssl-2.2.31-1.6.amzn1.i686
    httpd-tools-2.2.31-1.6.amzn1.i686
    httpd-debuginfo-2.2.31-1.6.amzn1.i686
    httpd-2.2.31-1.6.amzn1.i686

noarch:
    httpd-manual-2.2.31-1.6.amzn1.noarch

src:
    httpd-2.2.31-1.6.amzn1.src

x86_64:
    httpd-debuginfo-2.2.31-1.6.amzn1.x86_64
    httpd-devel-2.2.31-1.6.amzn1.x86_64
    httpd-tools-2.2.31-1.6.amzn1.x86_64
    mod_ssl-2.2.31-1.6.amzn1.x86_64
    httpd-2.2.31-1.6.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2015-578.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.