VulnerabilityModified
CVE-2019-11503
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."
HIGH 7.5EPSS 2.42%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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."
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.42% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-59
- Affected
- canonical/snapd
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2019/04/25/7Third Party Advisory
- https://github.com/snapcore/snapd/pull/6642Third Party Advisory
- 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/
- https://www.openwall.com/lists/oss-security/2019/04/18/4Exploit, Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/04/25/7Third Party Advisory
- https://github.com/snapcore/snapd/pull/6642Third Party Advisory
- 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/
- https://www.openwall.com/lists/oss-security/2019/04/18/4Exploit, Mailing List, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.