Vulnerability identifier: #VU52853
Vulnerability risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-61
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Exim
Server applications /
Mail servers
Vendor: Exim
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue in Exim log directory. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.
Successful exploitation of this vulnerability may result in privilege escalation.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Exim: 4.00 - 4.94.1
External links
http://seclists.org/oss-sec/2021/q2/91
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.