Bug 1706013 (CVE-2019-11503) - CVE-2019-11503 snapd: remote attacker able to bypass security restriction
Summary: CVE-2019-11503 snapd: remote attacker able to bypass security restriction
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2019-11503
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1706018 1706019 1706020 1706021
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-05-03 12:02 UTC by Dhananjay Arunesh
Modified: 2019-09-29 15:12 UTC (History)
3 users (show)

Fixed In Version: snapd 2.39
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-10 10:55:01 UTC
Embargoed:


Attachments (Terms of Use)

Description Dhananjay Arunesh 2019-05-03 12:02:00 UTC
snap-confine as included in snapd before 2.39 did not guard against symlink races when performing the chdir() to the current working directory of the calling user, aka a "cwd restore permission bypass."

Reference:
https://www.openwall.com/lists/oss-security/2019/04/18/4
https://github.com/snapcore/snapd/pull/6642

Comment 1 Dhananjay Arunesh 2019-05-03 12:04:42 UTC
Created snapd tracking bugs for this issue:

Affects: fedora-all [bug 1706018]


Created snapd-glib tracking bugs for this issue:

Affects: fedora-all [bug 1706019]

Comment 2 Dhananjay Arunesh 2019-05-03 12:05:18 UTC
Created snapd tracking bugs for this issue:

Affects: epel-7 [bug 1706020]


Created snapd-glib tracking bugs for this issue:

Affects: epel-7 [bug 1706021]

Comment 3 Product Security DevOps Team 2019-06-10 10:55:01 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.


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