openEuler 20.03 LTS SP1 update for openldap

1) Reachable Assertion

EUVDB-ID: #VU48515

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25710

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 when processing LDAP requests in slapd within the csnNormalize23() function in schema_init.c. A remote attacker can send a specially crafted packet to the server, trigger an assertion failure and crash the daemon.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

openldap-help: before 2.4.50-6

openldap-debugsource: before 2.4.50-6

openldap-clients: before 2.4.50-6

openldap-debuginfo: before 2.4.50-6

openldap-servers: before 2.4.50-6

openldap-devel: before 2.4.50-6

openldap: before 2.4.50-6

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1244

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.