CVE-2015-4456
ownCloud Desktop Client before 1.8.2 does not call QNetworkReply::ignoreSslErrors with the list...
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.
Exploit likelihood
What each source reports
NVD Score used
2.6
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.
- Record
CVE-2015-4456- CVSS 2.0
- 2.6 Low
AV:N/AC:H/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2015-4456- Updated
- 2026-11-02
EUVDEUVD-2015-4476 No score
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.
- Record
EUVD-2015-4476- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-p85q-834g-x9vx No score
ownCloud Desktop Client before 1.8.2 does not call QNetworkReply::ignoreSslErrors with the list...
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.
- Record
GHSA-p85q-834g-x9vx- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2015-4456- Updated
- 2026-11-02
OSVDEBIAN-CVE-2015-4456 No score
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.
- Record
DEBIAN-CVE-2015-4456- Updated
- 2026-11-02
OSVMGASA-2015-0256 No score
Updated owncloud-client package fixes security vulnerability
ownCloud Desktop Client before 1.8.2 was vulnerable against MITM attacks when used in combination with self-signed certificates (CVE-2015-4456).
The owncloud-client package has been updated to version 1.8.3, which fixes this issue as well as several other bugs
- Record
MGASA-2015-0256- Updated
- 2026-11-02
OSVUBUNTU-CVE-2015-4456 No score
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.
- Record
UBUNTU-CVE-2015-4456- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
owncloud-clientDebian:12 |
before 1.8.4+dfsg-1 | 1.8.4+dfsg-1 |
owncloud-clientDebian:13 |
before 1.8.4+dfsg-1 | 1.8.4+dfsg-1 |
owncloud-clientDebian:8 |
before 1.7.0~beta1+really1.6.4+dfsg-1+deb8u1, plus listed versions 1.7.0~beta1+really1.6.4+dfsg-1 |
1.7.0~beta1+really1.6.4+dfsg-1+deb8u1 |
owncloud-clientMageia:4 |
before 1.8.3-1.mga4 | 1.8.3-1.mga4 |
owncloud-clientMageia:5 |
before 1.8.3-1.mga5 | 1.8.3-1.mga5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2015-4456 is a low vulnerability (CVSS 2.6) in Owncloud Desktop Client, published July 5, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. Fixed in owncloud-client 1.8.4+dfsg-1.
References
debian.org/security/2015/dsa-3363
github.com/owncloud/client/issues/3283
owncloud.org/security/advisory?id=oc-sa-2015-009
securityfocus.com/bid/75354
nvd.nist.gov/vuln/detail/CVE-2015-4456
github.com/advisories/GHSA-p85q-834g-x9vx
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security-tracker.debian.org/tracker/CVE-2015-4456
advisories.mageia.org/MGASA-2015-0256.html
bugs.mageia.org/show_bug.cgi?id=16106
owncloud.org/changelog/desktop
ubuntu.com/security/CVE-2015-4456
owncloud.org/security/advisories/improper-validation-of-certificates-when-using-self-signed-certificates
cve.org/CVERecord?id=CVE-2015-4456