Severity
High
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 16.04
Description
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did not properly restrict access to iSCSI transport handles. A local attacker could use this to cause a denial of service or expose sensitive information (kernel pointer addresses). (CVE-2021-27363)
Adam Nichols discovered that an out-of-bounds read existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information (kernel memory). (CVE-2021-27364)
CVEs contained in this USN include: CVE-2021-27365, CVE-2021-27363, CVE-2021-27364.
Affected Cloud Foundry Products and Versions
Severity is high unless otherwise noted.
- Xenial Stemcells
- 456.x versions prior to 456.152
- 621.x versions prior to 621.115
- 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 456.152 or greater
- Upgrade 621.x versions to 621.115 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.
