High severity · published Jul 8, 2021
CVE-2021-21779
A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4
8.8
CVSS
2.9%
EPSS
No
On KEV
Description
A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
FE
Fedora · Fedoraproject
33; 34 · source: NVD
WE
Webkitgtk · Webkitgtk
2.30.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21779
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21779
Mailing List
http://www.openwall.com/lists/oss-security/2021/07/23/1
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238
Third Party Advisory
https://www.debian.org/security/2021/dsa-4945
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