USN-4915-1

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Source

https://ubuntu.com/security/notices/USN-4915-1

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4915-1.json

JSON Data

https://api.osv.dev/v1/vulns/USN-4915-1

Related

Published

2021-04-15T22:22:20.953502Z

Modified

2021-04-15T22:22:20.953502Z

Summary

linux-oem-5.6 vulnerabilities

Details

It was discovered that the overlayfs implementation in the Linux kernel did not properly validate the application of file system capabilities with respect to user namespaces. A local attacker could use this to gain elevated privileges. (CVE-2021-3493)

Vincent Dehors discovered that the shiftfs file system in the Ubuntu Linux kernel did not properly handle faults in copyfromuser() when passing through ioctls to an underlying file system. A local attacker could use this to cause a denial of service (memory exhaustion) or execute arbitrary code. (CVE-2021-3492)

References

Affected packages

Ubuntu:20.04:LTS / linux-oem-5.6

Package

Name: linux-oem-5.6
Purl: pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1054.58?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.6.0-1054.58

Affected versions

5.*

5.6.0-1007.7

5.6.0-1008.8

5.6.0-1010.10

5.6.0-1011.11

5.6.0-1013.13

5.6.0-1017.17

5.6.0-1018.18

5.6.0-1020.20

5.6.0-1021.21

5.6.0-1023.23

5.6.0-1026.26

5.6.0-1027.27

5.6.0-1028.28

5.6.0-1031.32

5.6.0-1032.33

5.6.0-1033.35

5.6.0-1034.36

5.6.0-1035.37

5.6.0-1036.39

5.6.0-1039.43

5.6.0-1042.46

5.6.0-1047.51

5.6.0-1048.52

5.6.0-1050.54

5.6.0-1052.56

5.6.0-1053.57

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "linux-image-unsigned-5.6.0-1054-oem": "5.6.0-1054.58",
            "linux-buildinfo-5.6.0-1054-oem": "5.6.0-1054.58",
            "linux-oem-5.6-headers-5.6.0-1054": "5.6.0-1054.58",
            "linux-tools-5.6.0-1054-oem": "5.6.0-1054.58",
            "linux-headers-5.6.0-1054-oem": "5.6.0-1054.58",
            "linux-image-unsigned-5.6.0-1054-oem-dbgsym": "5.6.0-1054.58",
            "linux-oem-5.6-tools-5.6.0-1054": "5.6.0-1054.58",
            "linux-modules-5.6.0-1054-oem": "5.6.0-1054.58",
            "linux-oem-5.6-tools-host": "5.6.0-1054.58"
        }
    ]
}