Remote code execution in GNOME Web (Epiphany)

1) Out-of-bounds write

EUVDB-ID: #VU66422

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-29536

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing a long page title in the ephy_string_shorten() function in the UI process. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

GNOME Web (Epiphany): 41.0 - 42.1

CPE2.3

• cpe:2.3:a:gnome:epiphany:*:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:41.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:41.3:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:42.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:42.1:*:*:*:*:*:*:*

External links

https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1106
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5K5UPNHVWXDPSMBNSB2645MD2N5CXQS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLLDMY4JYDZTMZSCPSY23K5YW3SQYUR6/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7YWVIUGFRA6GOE3QAPSJJ6EL3DJG5NX/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.