#VU66990 NULL pointer dereference in 389-ds-base - CVE-2022-2850

Vulnerability identifier: #VU66990

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-2850

CWE-ID: CWE-476

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 user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the sync_create_state_control() function when running a sync_repl client. A remote authenticated user can pass a malformed cookie in a query and perform a denial of service (DoS) attack.

Note, the vulnerability exists due to incomplete fix for #VU54107 (CVE-2021-3514).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

389-ds-base: 1.4.3.1 - 1.4.4.19

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1952907
https://bugzilla.suse.com/show_bug.cgi?id=1202470
https://github.com/389ds/389-ds-base/issues/4711

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.