Ubuntu update for openldap

Published: 2020-11-17 | Updated: 2025-04-23

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-25709 CVE-2020-25710
CWE-ID	CWE-617
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system slapd (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Reachable Assertion

EUVDB-ID: #VU48516

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-25709

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion in certificateListValidate() function in schema_init.c. A remote attacker can send specially crafted packet to the slapd daemon, trigger an assertion failure and crash the service.

Mitigation

Update the affected package openldap to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.10

slapd (Ubuntu package): before 2.4.42+dfsg-2ubuntu3.11

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4634-1

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.

2) Reachable Assertion

EUVDB-ID: #VU48515