comedi: ni_usb6501: fix NULL-deref in command paths (Linux Linux)

CVE-2021-47476
MEDIUM 4.6

At a glance

Source
NVD
EPSS
EPSS 0.39 % · percentile 33 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: comedi: ni_usb6501: fix NULL-deref in command paths The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing). Add the missing sanity checks to probe().

Weaknesses (CWE)

  • CWE-476 — NULL Pointer Dereference

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 4.6CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCISA-ADP
CVSS 3.1MEDIUM 4.6CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected a03bb00e50ab4c07107da58a52a0bff7943f360c < 58478143771b20ab219937b1c30a706590a59224 ; affected a03bb00e50ab4c07107da58a52a0bff7943f360c < aa39738423503825625853b643b9e99d11c23816 ; affected a03bb00e50ab4c07107da58a52a0bff7943f360c < df7b1238f3b599a0b9284249772cdfd1ea83a632 ; affected a03bb00e50ab4c07107da58a52a0bff7943f360c < bc51111bf6e8e7b6cc94b133e4c291273a16acd1 ; affected a03bb00e50ab4c07107da58a52a0bff7943f360c < b0156b7c9649d8f55a2ce3d3258509f1b2a181c3 ; affected a03bb00e50ab4c07107da58a52a0bff7943f360c < ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1
Linux · Linuxaffected 3.18 ; unaffected 0 < 3.18 ; unaffected 4.4.292 ≤ 4.4.* ; unaffected 4.9.290 ≤ 4.9.* ; unaffected 4.14.255 ≤ 4.14.* ; unaffected 4.19.217 ≤ 4.19.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD