Critical severity · published Feb 2, 2018
CVE-2018-6548
A use-after-free issue was discovered in libwebm through 2018-02-02
9.8
CVSS
1.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libwebm · Webmproject
through 1.0.0.27 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-6548
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-6548
Permissions Required
https://bugs.chromium.org/p/webm/issues/detail?id=1493
Exploit
https://github.com/dwfault/PoCs/blob/master/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info.md
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