MGASA-2021-0421 - Updated nextcloud-client packages fix security vulnerability

Publication date: 23 Sep 2021
URL: https://advisories.mageia.org/MGASA-2021-0421.html
Type: security
Affected Mageia releases: 8
CVE: CVE-2021-22895,
     CVE-2021-32728

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate
validation due to lack of SSL certificate verification when using the
"Register with a Provider" flow. (CVE-2021-22895)

In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if
a private key belongs to previously downloaded public certificate. If the
Nextcloud instance serves a malicious public key, the data would be
encrypted for this key and thus could be accessible to a malicious actor.
This issue is fixed in Nextcloud Desktop Client version 3.3.0

References:
- https://bugs.mageia.org/show_bug.cgi?id=29043
- https://security-tracker.debian.org/tracker/source-package/nextcloud-desktop
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22895
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32728

SRPMS:
- 8/core/nextcloud-client-3.3.3-1.mga8

Mageia 2021-0421: nextcloud-client security update

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow

Summary

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow. (CVE-2021-22895)
In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certificate. If the Nextcloud instance serves a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. This issue is fixed in Nextcloud Desktop Client version 3.3.0

References

- https://bugs.mageia.org/show_bug.cgi?id=29043

- https://security-tracker.debian.org/tracker/source-package/nextcloud-desktop

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22895

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32728

Resolution

MGASA-2021-0421 - Updated nextcloud-client packages fix security vulnerability

SRPMS

- 8/core/nextcloud-client-3.3.3-1.mga8

Severity
Publication date: 23 Sep 2021
URL: https://advisories.mageia.org/MGASA-2021-0421.html
Type: security
CVE: CVE-2021-22895, CVE-2021-32728

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