Vulnerability identifier: #VU25340
Vulnerability risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Dovecot
Server applications /
Mail servers
Vendor: Dovecot
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the IMAP and LMTP components when many characters must be read while computing the snippet and a trailing ">" character is present. As a result the recipient cannot read all messages in the mailbox.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Dovecot: 2.3.9 - 2.3.9.2
External links
http://www.openwall.com/lists/oss-security/2020/02/12/2
http://dovecot.org/pipermail/dovecot-news/2020-February/000430.html
http://dovecot.org/security
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.