Amazon Linux AMI update for httpd24

1) Improper input validation

EUVDB-ID: #VU13907

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-8011

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to improper filtering of input data within "mod_md" apache module when processing requests. A remote attacker can send a specially crafted HTTP request to the affected web server and trigger denial of service condition via coredumps.

Mitigation

Update the affected packages.

i686:
    httpd24-2.4.34-1.82.amzn1.i686
    mod24_md-2.4.34-1.82.amzn1.i686
    mod24_ssl-2.4.34-1.82.amzn1.i686
    mod24_ldap-2.4.34-1.82.amzn1.i686
    httpd24-tools-2.4.34-1.82.amzn1.i686
    mod24_proxy_html-2.4.34-1.82.amzn1.i686
    httpd24-debuginfo-2.4.34-1.82.amzn1.i686
    httpd24-devel-2.4.34-1.82.amzn1.i686
    mod24_session-2.4.34-1.82.amzn1.i686

noarch:
    httpd24-manual-2.4.34-1.82.amzn1.noarch

src:
    httpd24-2.4.34-1.82.amzn1.src

x86_64:
    mod24_proxy_html-2.4.34-1.82.amzn1.x86_64
    httpd24-devel-2.4.34-1.82.amzn1.x86_64
    mod24_ssl-2.4.34-1.82.amzn1.x86_64
    httpd24-tools-2.4.34-1.82.amzn1.x86_64
    mod24_md-2.4.34-1.82.amzn1.x86_64
    mod24_ldap-2.4.34-1.82.amzn1.x86_64
    mod24_session-2.4.34-1.82.amzn1.x86_64
    httpd24-2.4.34-1.82.amzn1.x86_64
    httpd24-debuginfo-2.4.34-1.82.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-2018-1062.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.