kdb: Fix buffer overflow during tab-complete (Linux Linux)

CVE-2024-39480
HIGH 8.4

En bref

Source
NVD
EPSS
EPSS 0.27 % · centile 19 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around.

Faiblesses (CWE)

  • CWE-121 — Débordement de tampon sur la pile
  • CWE-120 — Copie de tampon sans vérification de taille (débordement classique)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP
CVSS 3.1HIGH 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 5d5314d6795f3c1c0f415348ff8c51f7de042b77 < fb824a99e148ff272a53d71d84122728b5f00992 ; affected 5d5314d6795f3c1c0f415348ff8c51f7de042b77 < ddd2972d8e2dee3b33e8121669d55def59f0be8a ; affected 5d5314d6795f3c1c0f415348ff8c51f7de042b77 < cfdc2fa4db57503bc6d3817240547c8ddc55fa96 ; affected 5d5314d6795f3c1c0f415348ff8c51f7de042b77 < f636a40834d22e5e3fc748f060211879c056cd33 ; affected 5d5314d6795f3c1c0f415348ff8c51f7de042b77 < 33d9c814652b971461d1e30bead6792851c209e7 ; affected 5d5314d6795f3c1c0f415348ff8c51f7de042b77 < 107e825cc448b7834b31e8b1b3cf0f57426d46d5
Linux · Linuxaffected 2.6.35 ; unaffected 0 < 2.6.35 ; unaffected 4.19.316 ≤ 4.19.* ; unaffected 5.4.278 ≤ 5.4.* ; unaffected 5.10.219 ≤ 5.10.* ; unaffected 5.15.161 ≤ 5.15.*

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