Amazon Linux AMI update for httpd

1) Spoofing attack

EUVDB-ID: #VU1961

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-8743

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to insufficient sanitization of HTTP request, which contain whitespace characters. A remote attacker can send a specially crafted HTTP request, containing CR, FF, VTAB characters followed by CRLF sequence and inject arbitrary data in server response.

Successful exploitation of this vulnerability may result in content spoofing, web cache poisoning and XSS attacks.

Mitigation

Update the affected packages.

i686:
    httpd-devel-2.2.32-1.9.amzn1.i686
    httpd-debuginfo-2.2.32-1.9.amzn1.i686
    httpd-2.2.32-1.9.amzn1.i686
    httpd-tools-2.2.32-1.9.amzn1.i686
    mod_ssl-2.2.32-1.9.amzn1.i686

noarch:
    httpd-manual-2.2.32-1.9.amzn1.noarch

src:
    httpd-2.2.32-1.9.amzn1.src

x86_64:
    httpd-devel-2.2.32-1.9.amzn1.x86_64
    mod_ssl-2.2.32-1.9.amzn1.x86_64
    httpd-tools-2.2.32-1.9.amzn1.x86_64
    httpd-2.2.32-1.9.amzn1.x86_64
    httpd-debuginfo-2.2.32-1.9.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2017-851.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.