Amazon Linux AMI update for libvorbis

1) Buffer overflow

EUVDB-ID: #VU11140

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-5146

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when processing Vorbis audio within libvorbis library. A remote unauthenticated attacker can create a specially crafted HTML page, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.

i686:
    libvorbis-devel-1.3.3-8.7.amzn1.i686
    libvorbis-1.3.3-8.7.amzn1.i686
    libvorbis-debuginfo-1.3.3-8.7.amzn1.i686

noarch:
    libvorbis-devel-docs-1.3.3-8.7.amzn1.noarch

src:
    libvorbis-1.3.3-8.7.amzn1.src

x86_64:
    libvorbis-devel-1.3.3-8.7.amzn1.x86_64
    libvorbis-1.3.3-8.7.amzn1.x86_64
    libvorbis-debuginfo-1.3.3-8.7.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-2018-981.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.