CVE-2024-42247 wireguard: allowedips: avoid unaligned 64-bit memory accesses

2024-08-0715:14:32

Linux

www.cve.org

linux kernel

vulnerability

wireguard

allowedips

unaligned memory accesses

EPSS

Percentile

5.0%

JSON

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

wireguard: allowedips: avoid unaligned 64-bit memory accesses

On the parisc platform, the kernel issues kernel warnings because
swap_endian() tries to load a 128-bit IPv6 address from an unaligned
memory location:

Kernel: unaligned access to 0x55f4688c in wg_allowedips_insert_v6+0x2c/0x80 [wireguard] (iir 0xf3010df)
Kernel: unaligned access to 0x55f46884 in wg_allowedips_insert_v6+0x38/0x80 [wireguard] (iir 0xf2010dc)

Avoid such unaligned memory accesses by instead using the
get_unaligned_be64() helper macro.

[Jason: replace src[8] in original patch with src+8]

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/wireguard/allowedips.c"
    ],
    "versions": [
      {
        "version": "e7096c131e51",
        "lessThan": "ae630de24efb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e7096c131e51",
        "lessThan": "b4764f0ad3d6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e7096c131e51",
        "lessThan": "217978a29c6c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e7096c131e51",
        "lessThan": "6638a203abad",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e7096c131e51",
        "lessThan": "2fb34bf76431",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e7096c131e51",
        "lessThan": "948f991c62a4",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/wireguard/allowedips.c"
    ],
    "versions": [
      {
        "version": "5.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.6",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.222",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.163",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.100",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.41",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.10",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]