MGASA-2020-0388 - Updated tigervnc packages fix a security vulnerability

Publication date: 20 Oct 2020
URL: https://advisories.mageia.org/MGASA-2020-0388.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2020-26117

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0,
viewers mishandle TLS certificate exceptions. They store the certificates as
authorities, meaning that the owner of a certificate could impersonate any
server after a client had added an exception. (CVE-2020-26117)

References:
- https://bugs.mageia.org/show_bug.cgi?id=27270
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/XJC7PGEFEUUZTWSX7CGQG5YLB3NCQ6BO/
- https://www.debian.org/lts/security/2020/dla-2396
- - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26117

SRPMS:
- 7/core/tigervnc-1.10.1-1.2.mga7

Mageia 2020-0388: tigervnc security update

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions

Summary

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception. (CVE-2020-26117)

References

- https://bugs.mageia.org/show_bug.cgi?id=27270

- https://github.com/TigerVNC/tigervnc/releases/tag/v1.11.0

- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/XJC7PGEFEUUZTWSX7CGQG5YLB3NCQ6BO/

- https://www.debian.org/lts/security/2020/dla-2396

- - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26117

Resolution

MGASA-2020-0388 - Updated tigervnc packages fix a security vulnerability

SRPMS

- 7/core/tigervnc-1.10.1-1.2.mga7

Severity
Publication date: 20 Oct 2020
URL: https://advisories.mageia.org/MGASA-2020-0388.html
Type: security
CVE: CVE-2020-26117

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