CVE-2019-8375

high-risk
Published 2019-02-24

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, UIProcess/API/gtk/WebKitScriptDialogImpl.cpp, and UIProcess/API/gtk/WebKitWebViewGtk.cpp, as demonstrated by GNOME Web (aka Epiphany).

Do I need to act?

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19.3% chance of exploitation in next 30 days
EPSS score — higher than 81% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
46465
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (6)

Affected Vendors

Canonical Opensuse Webkitgtk

References (16)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html
Issue Tracking https://bugs.webkit.org/show_bug.cgi?id=184875
Patch https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531
Patch https://trac.webkit.org/changeset/241515/webkit
Third Party Advisory https://usn.ubuntu.com/3948-1/
Exploit https://www.exploit-db.com/exploits/46465/
Exploit https://www.inputzero.io/2019/02/fuzzing-webkit.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html
Issue Tracking https://bugs.webkit.org/show_bug.cgi?id=184875
Patch https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531
Patch https://trac.webkit.org/changeset/241515/webkit
Third Party Advisory https://usn.ubuntu.com/3948-1/
Exploit https://www.exploit-db.com/exploits/46465/
Exploit https://www.inputzero.io/2019/02/fuzzing-webkit.html
59
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 14/34 · Moderate
Exposure 13/34 · Low