Vulnerability CVE-2019-11503
Published: 2019-04-24

Description:
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."

Type:

CWE-59

 (Improper Link Resolution Before File Access ('Link Following'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Canonical -> Snapd 

 References:
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
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