Severity
High
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 16.04
Description
Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27171)
Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27170)
CVEs contained in this USN include: CVE-2020-27170, CVE-2020-27171.
Affected Cloud Foundry Products and Versions
Severity is high unless otherwise noted.
- Xenial Stemcells
- 456.x versions prior to 456.154
- 621.x versions prior to 621.117
- All other stemcells not listed.
Mitigation
Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:
- Xenial Stemcells
- Upgrade 456.x versions to 456.154 or greater
- Upgrade 621.x versions to 621.117 or greater
- All other stemcells should be upgraded to the latest version available on bosh.io.
References
History
2021-04-14: Initial vulnerability report published.
