Ubuntu update for dovecot



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2024-23184
CVE-2024-23185
CWE-ID CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

dovecot-core (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU96022

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-23184

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when parsing a large number of address headers (e.g. From, To, Cc, Bcc, etc.). A remote attacker can send a specially crafted email address to the server, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package dovecot to the latest version.

Vulnerable software versions

Ubuntu: 24.04

dovecot-core (Ubuntu package): before 1:2.3.21+dfsg1-2ubuntu6

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6982-1


Q & A

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.

2) Resource exhaustion

EUVDB-ID: #VU96021

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-23185

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when parsing overly large email headers. A remote attacker can send a specially crafted email to the server, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package dovecot to the latest version.

Vulnerable software versions

Ubuntu: 24.04

dovecot-core (Ubuntu package): before 1:2.3.21+dfsg1-2ubuntu6

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6982-1


Q & A

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.



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