Buffer overflow in GNOME WebKitGTK

1) Buffer overflow

EUVDB-ID: #VU18301

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-8375

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the UIProcess subsystem when processing an overly large script dialog size that exceeds the web view size. A remote attacker can send a specially crafted request to the affected application, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.22.0 - 2.23.90

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.