Bug 1271992 - (CVE-2015-0856) CVE-2015-0856 sddm: Access to the KDE crash handler
CVE-2015-0856 sddm: Access to the KDE crash handler
Status: CLOSED CURRENTRELEASE
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20151014,repor...
: Security
Depends On: 1271993
Blocks:
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Reported: 2015-10-15 04:54 EDT by Adam Mariš
Modified: 2016-01-12 08:37 EST (History)
7 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-01-12 08:37:53 EST
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Description Adam Mariš 2015-10-15 04:54:31 EDT
A vulnerability in sddm was found allowing shell access to the sddm user in case of a crash. Some themes may use KDE components which will automatically load KDE's crash handler. If the greeter were to then somehow crash, that would leave a crash handler allowing other actions, albeit as the locked down SDDM user. Only SDDM users using the breeze theme from plasma-workspace are affected.

Upstream patch:

https://github.com/sddm/sddm/commit/4cfed6b0a625593fb43876f04badc4dd99799d86
Comment 1 Adam Mariš 2015-10-15 04:54:58 EDT
Created sddm tracking bugs for this issue:

Affects: fedora-all [bug 1271993]
Comment 2 Fedora Update System 2015-10-31 12:09:35 EDT
sddm-0.12.0-5.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 3 Fedora Update System 2015-11-12 20:53:40 EST
sddm-0.12.0-5.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

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