#VU13404 Buffer overflow in Evolution - CVE-2018-12422

Vulnerability identifier: #VU13404

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-12422

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Evolution
Client/Desktop applications / Office applications

Vendor: Gnome Development Team

Description

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

The vulnerability exists in the strcat function of GNOME Evolution due to boundary error when improper processing of long query strings by the strcat function, as defined in the addressbook/backends/ldap/e-book-backend-ldap.c source code file in the Evolution-Data-Server package. A remote unauthenticated attacker can send a long query string, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.

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

Mitigation
Update to version 3.29.3.

Vulnerable software versions

Evolution: 2.0 - 3.29.2

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External links
https://gitlab.gnome.org/GNOME/evolution-data-server/commit/34bad6173

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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.