Anolis OS update for cyrus-imapd (Anolis OS 8.2)

1) Input validation error

EUVDB-ID: #VU59879

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-2021-33582

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input that is mishandled during hash-table interaction. A remote attacker can cause a denial of service (multiple-minute daemon hang) via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

cyrus-imapd-vzic: before 3.0.7-16

cyrus-imapd-utils: before 3.0.7-16

cyrus-imapd: before 3.0.7-16

CPE2.3

• cpe:2.3:o:openanolis:anolis_os:8:*:*:*:*:*:*:*
• cpe:2.3:o:openanolis:cyrus-imapd-vzic:*:*:*:*:*:anolis_os:*:*
• cpe:2.3:o:openanolis:cyrus-imapd-utils:*:*:*:*:*:anolis_os:*:*
• cpe:2.3:o:openanolis:cyrus-imapd:*:*:*:*:*:anolis_os:*:*

External links

https://anas.openanolis.cn/errata/detail/ANSA-2021:0172

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.