Amazon Linux AMI update for 389-ds-base

1) Improper Authentication

EUVDB-ID: #VU55334

Risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3652

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in the way the asterisk character is processed by the LDAP server when importing password hashes from /etc/shadow for disabled accounts. As a result of the flaw, if an LDAP admin imports such an account from a NIS or /etc/shadow database into Directory Server, any password will be valid for that account.

Mitigation

Update the affected packages:

i686:
    389-ds-base-debuginfo-1.3.10.2-9.67.amzn1.i686
    389-ds-base-1.3.10.2-9.67.amzn1.i686
    389-ds-base-devel-1.3.10.2-9.67.amzn1.i686
    389-ds-base-libs-1.3.10.2-9.67.amzn1.i686
    389-ds-base-snmp-1.3.10.2-9.67.amzn1.i686

src:
    389-ds-base-1.3.10.2-9.67.amzn1.src

x86_64:
    389-ds-base-libs-1.3.10.2-9.67.amzn1.x86_64
    389-ds-base-1.3.10.2-9.67.amzn1.x86_64
    389-ds-base-devel-1.3.10.2-9.67.amzn1.x86_64
    389-ds-base-debuginfo-1.3.10.2-9.67.amzn1.x86_64
    389-ds-base-snmp-1.3.10.2-9.67.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

389-ds-base: before 1.3.10.2-9.67

External links

http://alas.aws.amazon.com/ALAS-2022-1620.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.