USN-4910-1

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Please try reporting it to the source first.

Source

https://ubuntu.com/security/notices/USN-4910-1

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4910-1.json

JSON Data

https://api.osv.dev/v1/vulns/USN-4910-1

Related

Published

2021-04-13T20:41:12.754178Z

Modified

2021-04-13T20:41:12.754178Z

Summary

linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities

Details

Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could allow a user space program to probe for valid kernel addresses. A local attacker could use this to ease exploitation of another kernel vulnerability. (CVE-2021-20239)

It was discovered that the BPF verifier in the Linux kernel did not properly handle signed add32 and sub integer overflows. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-20268)

It was discovered that the priority inheritance futex implementation in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3347)

It was discovered that the network block device (nbd) driver in the Linux kernel contained a use-after-free vulnerability during device setup. A local attacker with access to the nbd device could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3348)

吴异 discovered that the NFS implementation in the Linux kernel did not properly prevent access outside of an NFS export that is a subdirectory of a file system. An attacker could possibly use this to bypass NFS access restrictions. (CVE-2021-3178)

References

Affected packages

Ubuntu:20.04:LTS / linux-hwe-5.8

Package

Name: linux-hwe-5.8
Purl: pkg:deb/ubuntu/linux-hwe-5.8?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.8.0-49.55~20.04.1

Affected versions

5.*

5.8.0-23.24~20.04.1

5.8.0-25.26~20.04.1

5.8.0-28.30~20.04.1

5.8.0-29.31~20.04.1

5.8.0-31.33~20.04.1

5.8.0-33.36~20.04.1

5.8.0-34.37~20.04.2

5.8.0-36.40~20.04.1

5.8.0-38.43~20.04.1

5.8.0-40.45~20.04.1

5.8.0-41.46~20.04.1

5.8.0-43.49~20.04.1

5.8.0-44.50~20.04.1

5.8.0-45.51~20.04.1

5.8.0-48.54~20.04.1

Ecosystem specific

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}