openEuler update for openldap

1) Reachable Assertion

EUVDB-ID: #VU50779

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-2021-27212

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 packets within the issuerAndThisUpdateCheck() function in  schema_init.c. A remote attacker can send a specially crafted packet with a short timestamp to the slapd and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

openldap-help: before 2.4.50-4

openldap-servers: before 2.4.50-4

openldap-clients: before 2.4.50-4

openldap-debugsource: before 2.4.50-4

openldap-debuginfo: before 2.4.50-4

openldap-devel: before 2.4.50-4

openldap: before 2.4.50-4

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:20.03:LTS:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openldap-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:openldap-servers:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:openldap-clients:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:openldap-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:openldap-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:openldap-devel:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:openldap:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1119

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.