Denial of service in Cyrus IMAP

1) Resource exhaustion

EUVDB-ID: #VU91167

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-34055

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when handling multiple LITERALs in a single command. A remote user can trigger memory exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cyrus IMAP Server: 3.0.0 - 3.11.0

CPE2.3

• cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:3.0.2:*:*:*:*:*:*:*

External links

https://github.com/cyrusimap/cyrus-imapd/commit/ef9e4e8314d6a06f2269af0ccf606894cc3fe489
https://www.cyrusimap.org/imap/download/release-notes/3.8/x/3.8.3.html
https://www.cyrusimap.org/dev/imap/download/release-notes/3.10/x/3.10.0-rc1.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.