CVE-2019-8375 — The UIProcess subsystem in WebKit, as used in WebKitGTK through 2

The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent the script dialog size from exceeding the web view size, which allows remote attackers to cause a denial of service (Buffer Overflow) or poss

01What is this vulnerability?

The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent the script dialog size from exceeding the web view size, which allows remote attackers to cause a denial of service (Buffer Overflow) or possibly have unspecified other impact, related to UIProcess/API/gtk/WebKitScriptDialogGtk.cpp…

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-02-24T13:00:00.000Z
• Last modified: 2024-08-04T21:17:31.297Z

09References

• trac.webkit.org — https://trac.webkit.org/changeset/241515/webkit
• www.exploit-db.com — https://www.exploit-db.com/exploits/46465/
• github.com — https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531
• www.inputzero.io — https://www.inputzero.io/2019/02/fuzzing-webkit.html
• bugs.webkit.org — https://bugs.webkit.org/show_bug.cgi?id=184875
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html
• usn.ubuntu.com — https://usn.ubuntu.com/3948-1/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html