PT-2018-17628 · Google · Libwebm

Published 2018-02-02 · Updated 2018-02-21 · CVE-2018-6548

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions libwebm through 2018-02-02

Description A use-after-free issue was discovered. If a Vp9HeaderParser was initialized once before, its property frame would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm info.cc.

Recommendations For libwebm through 2018-02-02, at the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2018-6548

Affected Products

Libwebm

References · 7

• 🔥 https://github.com/dwfault/PoCs/blob/master/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2018-6548 · Security Note
• https://ubuntu.com/security/CVE-2018-6548 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-6548 · Security Note
• https://osv.dev/vulnerability/CVE-2018-6548 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-6548 · Vendor Advisory
• https://bugs.chromium.org/p/webm/issues/detail?id=1493 · Note