Bug 1214183 (CVE-2023-39953) - VUL-0: CVE-2023-39953: nextcloud: missing verification in OIDC allows man in the middle attacks
Summary: VUL-0: CVE-2023-39953: nextcloud: missing verification in OIDC allows man in ...
Status: RESOLVED INVALID
Alias: CVE-2023-39953
Product: openSUSE Distribution
Classification: openSUSE
Component: Security (show other bugs)
Version: Leap 15.4
Hardware: Other Other
: P5 - None : Normal (vote)
Target Milestone: ---
Assignee: Eric Schirra
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/374977/
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Reported: 2023-08-11 08:58 UTC by Carlos López
Modified: 2023-08-11 09:04 UTC (History)
0 users

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Description Carlos López 2023-08-11 08:58:46 UTC 
CVE-2023-39953

user_oidc provides the OIDC connect user backend for Nextcloud, an open-source
cloud platform. Starting in version 1.0.0 and prior to version 1.3.3, missing
verification of the issuer would have allowed an attacker to perform a
man-in-the-middle attack returning corrupted or known token they also have
access to. user_oidc 1.3.3 contains a patch. No known workarounds are available.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-39953
https://bugzilla.redhat.com/show_bug.cgi?id=2231145
https://www.cve.org/CVERecord?id=CVE-2023-39953
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36j
https://github.com/nextcloud/user_oidc/pull/642
https://hackerone.com/reports/2021684
Comment 1 Carlos López 2023-08-11 09:04:49 UTC 
user_oidc is not in openSUSE, closing.