Amazon Linux AMI update for httpd

1) Improper access control

EUVDB-ID: #VU8907

Risk: Low

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:Clear]

CVE-ID: CVE-2017-12171

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists in Apache HTTPD on Red Hat Enterprise Linux due to improper parsing of comments in the "Allow" and "Deny" configuration lines. A remote attacker can bypass security restrictions and access an ostensibly restricted HTTP resource.

Mitigation

Update the affected packages.

i686:
    mod_ssl-2.2.34-1.16.amzn1.i686
    httpd-tools-2.2.34-1.16.amzn1.i686
    httpd-devel-2.2.34-1.16.amzn1.i686
    httpd-2.2.34-1.16.amzn1.i686
    httpd-debuginfo-2.2.34-1.16.amzn1.i686

noarch:
    httpd-manual-2.2.34-1.16.amzn1.noarch

src:
    httpd-2.2.34-1.16.amzn1.src

x86_64:
    httpd-devel-2.2.34-1.16.amzn1.x86_64
    httpd-2.2.34-1.16.amzn1.x86_64
    mod_ssl-2.2.34-1.16.amzn1.x86_64
    httpd-debuginfo-2.2.34-1.16.amzn1.x86_64
    httpd-tools-2.2.34-1.16.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-2017-921.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.