Reachable Assertion in openldap (Alpine package)

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

Install update from vendor's website.

Vulnerable software versions

openldap (Alpine package): 2.4.24-r0 - 2.4.56-r0

CPE2.3

• cpe:2.3:a:alpine:openldap_alpine_package:2.4.24-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:a:alpine:openldap_alpine_package:2.4.24-r1:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:a:alpine:openldap_alpine_package:2.4.24-r2:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=14d739b8cb4d55b4740d6b00583bfb451a13d5a1

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.