CVE-2021-3600: fedora Out-of-bounds Read — Fix

Description

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.14.115 — 4.14.308
linux	linux_kernel	4.15 — 4.19.206
linux	linux_kernel	4.20 — 5.4.98
linux	linux_kernel	5.5 — 5.10.16
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
canonical	ubuntu_linux	All
canonical	ubuntu_linux	All
canonical	ubuntu_linux	All
fedoraproject	fedora	All
redhat	enterprise_linux	All

References

Advisories & Patches

https://git.kernel.org/linus/e88b2c6e5a4d9ce30d75391e4d950da74bb2bd90 https://git.kernel.org/linus/e88b2c6e5a4d9ce30d75391e4d950da74bb2bd90

Other References

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3600 https://ubuntu.com/security/notices/USN-5003-1 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3600 https://ubuntu.com/security/notices/USN-5003-1

Frequently Asked Questions

What is CVE-2021-3600? +

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-3600? +

CVE-2021-3600 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2021-3600? +

CVE-2021-3600 affects products from canonical, fedoraproject, linux, redhat, specifically: enterprise_linux, fedora, linux_kernel, ubuntu_linux. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-3600? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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