Vulnerability identifier: #VU52859
Vulnerability risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-787
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 boundary error within the parse_fix_phrase() function. A local user can trigger an out-of-bounds write and execute arbitrary code on the target system with elevated privileges.
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.