Description
ownCloud Desktop Client before 1.8.2 does not call QNetworkReply::ignoreSslErrors with the list of errors to be ignored, which allows man-in-the-middle attackers to bypass the user's certificate distrust decision and obtain sensitive information by leveraging a self-signed certificate and a connection to a server using its own self-signed certificate.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | owncloud-client | 1.8.4+dfsg-1 | — |
| Debian 12 | owncloud-client | 1.8.4+dfsg-1 | — |
| Debian 8 | owncloud-client | 1.7.0~beta1+really1.6.4+dfsg-1+deb8u1 | DSA-3363-1 |
Advisories 1
- DSA-3363-1 owncloud-client - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-3363 vendor-advisory
- https://github.com/owncloud/client/issues/3283
- https://owncloud.org/security/advisory/?id=oc-sa-2015-009
- 75354 vdb-entry