Vulnerability-Lookup

GHSA-C55X-85RG-X529

Vulnerability from github – Published: 2022-05-24 17:45 – Updated: 2022-05-24 17:45

Details

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.

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  "affected": [],
  "aliases": [
    "CVE-2021-3444"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-03-23T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 (\"bpf: Fix truncation handling for mod32 dst reg wrt zero\") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.",
  "id": "GHSA-c55x-85rg-x529",
  "modified": "2022-05-24T17:45:09Z",
  "published": "2022-05-24T17:45:09Z",
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3444"
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CVE-2021-3444 (GCVE-0-2021-3444)

Vulnerability from cvelistv5 – Published: 2021-03-23 17:45 – Updated: 2024-09-16 17:27

Title

Linux kernel bpf verifier incorrect mod32 truncation

Summary

Severity

7.8 (High)


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

CWE

CWE-681 - Incorrect Conversion between Numeric Types

Assigner

canonical CNA under the mitre root

CNA scorecard B 80/100 over 102 records in the last 180 days details

References

7 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/03/23/2	mailing-listx_refsource_MLIST
http://packetstormsecurity.com/files/162117/Kerne…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021041…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
http://packetstormsecurity.com/files/164950/Kerne…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Linux	kernel	Affected: trunk , < 5.12-rc1 (custom) Affected: 5.11 , < 5.11.2 (custom) Affected: 5.10 , < 5.10.19 (custom) Affected: 5.4 , < 5.4.101 (custom)

Date Public

2021-03-23 00:00

Credits

De4dCr0w of 360 Alpha Lab

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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GHSA-C55X-85RG-X529

CVE-2021-3444 (GCVE-0-2021-3444)

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