Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-20230 |
CWE-ID | CWE-295 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
SUSE Linux Enterprise Module for Server Applications Operating systems & Components / Operating system stunnel-debugsource Operating systems & Components / Operating system package or component stunnel-debuginfo Operating systems & Components / Operating system package or component stunnel Operating systems & Components / Operating system package or component |
Vendor | SUSE |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU50843
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-20230
CWE-ID:
CWE-295 - Improper Certificate Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to improper client certificate validation, when redirect and verifyChain options are used. A remote attacker can bypass implemented security restrictions with a any valid certificated and gain access to sensitive information.
Update the affected package stunnel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Server Applications: 15-SP2
stunnel-debugsource: before 5.57-3.11.1
stunnel-debuginfo: before 5.57-3.11.1
stunnel: before 5.57-3.11.1
External linkshttp://www.suse.com/support/update/announcement/2021/suse-su-20210772-1/
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.