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Ubuntu 18.04: USN-4661-1 Moderate: Snapcraft Access Control Flaw

ubuntu
Calendar Grey December 3, 2020
Dist Ubuntu Esm H88
A significant vulnerability in Snapcraft allows circumvention of access controls. Ensure your system is updated to mitigate possible threats.
An intended access restriction could be bypassed in snaps built with Snapcraft

Summary

An intended access restriction could be bypassed in snaps built with

Snapcraft

Software Description:

- snapcraft: easily craft snaps

Details:

It was discovered that Snapcraft includes the current directory when

configuring LD_LIBRARY_PATH for application commands. If a user were

tricked into installing a malicious snap or downloading a malicious

library, under certain circumstances an attacker could exploit this to

affect strict mode snaps that have access to the library and when

launched from the directory containing the library.

Topics%20covered

Topics Covered

security advisory moderate ubuntu access bypass snapcraft

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
  snapcraft                       2.43.1+18.04.1

Ubuntu 16.04 LTS:
  snapcraft                       2.43.1+16.04.1

For users of the snap package, Snapcraft will automatically refresh
itself to Snapcraft 4.4.4 which is unaffected. For users of the deb
package, on Ubuntu 16.04 LTS and 18.04 LTS, please perform a standard
system update. In either case, once Snapcraft has been updated, you need
to rebuild any packages built with the affected Snapcraft.

References

https://ubuntu.com/security/notices/USN-4661-1

CVE-2020-27348, https://bugs.launchpad.net/snapcraft/+bug/1901572

December 03, 2020

Topics%20covered

Topics Covered

security advisory moderate ubuntu access bypass snapcraft

Package Information

https://launchpad.net/ubuntu/+source/snapcraft/2.43.1+18.04.1
https://launchpad.net/ubuntu/+source/snapcraft/2.43.1+16.04.1

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