CVE-2021-21779

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.

Summary:

Reference Links(if available):

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238

http://www.openwall.com/lists/oss-security/2021/07/23/1

https://lists.fedoraproject.org/archives/list/[email protected]/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/

https://www.debian.org/security/2021/dsa-4945

CVSS Score (if available)

v2: / MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

v3: / HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVE-2021-21779

Summary:

Reference Links(if available):

CVSS Score (if available)

Links to Exploits(if available)

[LOCKBIT3] – Ransomware Victim: madison-home[.]com

[CHORT] – Ransomware Victim: sheboyganwi[.]gov

[QILIN] – Ransomware Victim: Zimmerman & Frachtman PA Law Firm

[QILIN] – Ransomware Victim: Calvert Home Mortgage Investment

[QILIN] – Ransomware Victim: LBCO Contracting LTD

Summary:

Reference Links(if available):

CVSS Score (if available)

Links to Exploits(if available)

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[LOCKBIT3] – Ransomware Victim: madison-home[.]com

[CHORT] – Ransomware Victim: sheboyganwi[.]gov

[QILIN] – Ransomware Victim: Zimmerman & Frachtman PA Law Firm

[QILIN] – Ransomware Victim: Calvert Home Mortgage Investment

[QILIN] – Ransomware Victim: LBCO Contracting LTD