Amazon Linux AMI update for cyrus-imapd

Published: 2022-01-20

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-33582
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU59879

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

Update the affected packages:

i686:
    cyrus-imapd-2.4.22-1.10.amzn1.i686
    cyrus-imapd-utils-2.4.22-1.10.amzn1.i686
    cyrus-imapd-debuginfo-2.4.22-1.10.amzn1.i686
    cyrus-imapd-devel-2.4.22-1.10.amzn1.i686

src:
    cyrus-imapd-2.4.22-1.10.amzn1.src

x86_64:
    cyrus-imapd-2.4.22-1.10.amzn1.x86_64
    cyrus-imapd-debuginfo-2.4.22-1.10.amzn1.x86_64
    cyrus-imapd-utils-2.4.22-1.10.amzn1.x86_64
    cyrus-imapd-devel-2.4.22-1.10.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2022-1559.html

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.