CVE-2023-52530 wifi: mac80211: fix potential key use-after-free

2024-03-0221:52:34

Linux

www.cve.org

linux kernel

mac80211

key use-after-free

ieee80211_key_link

krack protection

iwlwifi

wowlan

cfg80211.

5.9 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.8%

JSON

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: fix potential key use-after-free

When ieee80211_key_link() is called by ieee80211_gtk_rekey_add()
but returns 0 due to KRACK protection (identical key reinstall),
ieee80211_gtk_rekey_add() will still return a pointer into the
key, in a potential use-after-free. This normally doesn’t happen
since it’s only called by iwlwifi in case of WoWLAN rekey offload
which has its own KRACK protection, but still better to fix, do
that by returning an error code and converting that to success on
the cfg80211 boundary only, leaving the error for bad callers of
ieee80211_gtk_rekey_add().

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mac80211/cfg.c",
      "net/mac80211/key.c"
    ],
    "versions": [
      {
        "version": "fdf7cb4185b6",
        "lessThan": "2f4e16e39e4f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fdf7cb4185b6",
        "lessThan": "65c72a720170",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fdf7cb4185b6",
        "lessThan": "31db78a4923e",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mac80211/cfg.c",
      "net/mac80211/key.c"
    ],
    "versions": [
      {
        "version": "4.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.57",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5.7",
        "lessThanOrEqual": "6.5.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]