CVE-2022-26562 json
An issue in provider/libserver/ECKrbAuth.cpp of Kopano Core <= v11.0.2.51 contains an issue which allows attackers to authenticate even if…
published 2022-04-01 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-31118
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
An issue in provider/libserver/ECKrbAuth.cpp of Kopano Core <= v11.0.2.51 contains an issue which allows attackers to authenticate even if the user account or password is expired. It also exists in the predecessor Zarafa Collaboration Platform (ZCP) in provider/libserver/ECPamAuth.cpp of Zarafa >= 6.30 (introduced between 6.30.0 RC1e and 6.30.8 final).
Patch / fix
- kopanocore Ubuntu 20.04 LTS 8.7.0-7ubuntu1.1
- kopanocore Ubuntu 22.04 LTS 8.7.0-7.1ubuntu10.1
- kopanocore Ubuntu Pro 18.04 LTS 8.5.5-0ubuntu1+esm1
ubuntu advisories UBUNTU-CVE-2022-26562
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
2.15% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- stash.kopano.io https://stash.kopano.io/projects/KC/repos/kopanocore/browse/provider/libserver/ECKrbAuth.cpp#137 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
stash.kopano.io
/projects/KC/repos/kopanocore/browse/provider/libserver/ECKrbAuth.cpp#137
exploit, vendor-advisory
-
kopano.com
/
vendor-advisory
-
lists.debian.org
/debian-lts-announce/2023/03/msg00006.html
mailing-list
- jira.kopano.io /browse/KC-2021
- github.com /Kopano-dev/kopano-core/blob/master/provider/libserver/ECKrbAuth.cpp#L137
- bugzilla.redhat.com /show_bug.cgi?id=2192126
- bodhi.fedoraproject.org /updates/FEDORA-EPEL-2023-342b96903b
- src.fedoraproject.org /rpms/zarafa/c/a5a8366ccf07f248fae6edffb5123cfda579bfdb?branch=epel7
Sources
- CVE List CVE-2022-26562
- NVD CVE-2022-26562
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