#VU55334 Improper Authentication in 389-ds-base


Published: 2021-07-27

Vulnerability identifier: #VU55334

Vulnerability 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

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


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


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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