Vulnerability identifier: #VU52866
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Exim
Server applications /
Mail servers
Vendor: Exim
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions
The vulnerability exists due to insufficient validation of user-supplied input when processing new line characters. A remote attacker can inject a new line character into the spool header file and modify the mail queue.
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?
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.