CVE-2019-11503
First published: Wed Apr 24 2019(Updated: )
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."
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical snapd | <2.39 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2019/04/25/7
- https://github.com/snapcore/snapd/pull/6642
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM/
- https://www.openwall.com/lists/oss-security/2019/04/18/4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM/
Frequently Asked Questions
What is CVE-2019-11503?
CVE-2019-11503 is a vulnerability in snap-confine that allows symlink races and bypass of cwd restore permission.
What is the severity of CVE-2019-11503?
The severity of CVE-2019-11503 is high with a CVSS score of 7.5.
How does CVE-2019-11503 affect the software?
CVE-2019-11503 affects canonical snapd versions up to and excluding 2.39.
How can I fix CVE-2019-11503?
To fix CVE-2019-11503, update snapd to version 2.39 or newer.
Where can I find more information about CVE-2019-11503?
More information about CVE-2019-11503 can be found at the following references. - [Reference 1](http://www.openwall.com/lists/oss-security/2019/04/25/7) - [Reference 2](https://github.com/snapcore/snapd/pull/6642) - [Reference 3](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/)
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