Use After Free in Webmproject Libwebm
CVE-2018-6548
A use-after-free issue was discovered in libwebm through 2018-02-02. 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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (71.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/dwfault/PoCs/blob/master/libwebm Vp9HeaderParser UAF by PrintVP9Info… (Exploit, Third Party Advisory)
- bugs.chromium.org/p/webm/issues/detail (Permissions Required)
Frequently asked questions
- What is CVE-2018-6548?
- CVE-2018-6548 is a critical-severity vulnerability in Webmproject Libwebm, classified under Use After Free. CVSS score: 9.8/10. Published 2018-02-02.
- How severe is CVE-2018-6548?
- Critical severity. CVSS v3 base score is 9.8 out of 10.