openEuler 20.03 LTS update for tigervnc
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-26117 |
| CWE-ID | CWE-295 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
openEuler Operating systems & Components / Operating system tigervnc-server-module Operating systems & Components / Operating system package or component tigervnc-debugsource Operating systems & Components / Operating system package or component tigervnc-debuginfo Operating systems & Components / Operating system package or component tigervnc-server Operating systems & Components / Operating system package or component tigervnc-server-applet Operating systems & Components / Operating system package or component tigervnc-help Operating systems & Components / Operating system package or component tigervnc-server-minimal Operating systems & Components / Operating system package or component tigervnc Operating systems & Components / Operating system package or component |
| Vendor | openEuler |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper Certificate Validation
EUVDB-ID: #VU47533
Risk: Medium
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-26117
CWE-ID:
CWE-295 - Improper Certificate Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a MitM attack.
The vulnerability exists due to improper TLS certificate validation in rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC. Any previously accepted certificate will be considered trusted, meaning that the owner of a certificate could impersonate any server after a client had added an exception.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS
tigervnc-server-module: before 1.10.1-6
tigervnc-debugsource: before 1.10.1-6
tigervnc-debuginfo: before 1.10.1-6
tigervnc-server: before 1.10.1-6
tigervnc-server-applet: before 1.10.1-6
tigervnc-help: before 1.10.1-6
tigervnc-server-minimal: before 1.10.1-6
tigervnc: before 1.10.1-6
CPE2.3- cpe:2.3:o:openeuler:openeuler:20.03:LTS:*:*:*:*:*:*
- cpe:2.3:a:openeuler:tigervnc-server-module:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc-debugsource:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc-server:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc-server-applet:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc-help:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc-server-minimal:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:tigervnc:*:*:*:*:*:openeuler:*:*
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1105
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.
