#VU55334 Improper Authentication in 389-ds-base - CVE-2021-3652

Vulnerability identifier: #VU55334

Vulnerability risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3652

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
389-ds-base
Server applications / Directory software, identity management

Vendor: 389 Directory Server Project

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
Install updates from vendor's website.

Vulnerable software versions

389-ds-base: 2.0.1 - 2.0.6

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1982782
https://github.com/389ds/389-ds-base/issues/4817
https://github.com/389ds/389-ds-base/pull/4819

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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.