CVE-2024-36975 KEYS: trusted: Do not use WARN when encode fails

2024-06-1819:20:24

Linux

www.cve.org

linux kernel

vulnerability

keys

asn1_encode_sequence

location

stack trace

crash

panic_on_warn

undocumented

pr_err

return value

0.0004 Low

EPSS

Percentile

10.4%

JSON

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

KEYS: trusted: Do not use WARN when encode fails

When asn1_encode_sequence() fails, WARN is not the correct solution.

asn1_encode_sequence() is not an internal function (located
in lib/asn1_encode.c).
Location is known, which makes the stack trace useless.
Results a crash if panic_on_warn is set.

It is also noteworthy that the use of WARN is undocumented, and it
should be avoided unless there is a carefully considered rationale to
use it.

Replace WARN with pr_err, and print the return value instead, which is
only useful piece of information.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "security/keys/trusted-keys/trusted_tpm2.c"
    ],
    "versions": [
      {
        "version": "f2219745250f",
        "lessThan": "96f650995c70",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f2219745250f",
        "lessThan": "681935009fec",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f2219745250f",
        "lessThan": "1c652e1e1067",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f2219745250f",
        "lessThan": "d32c6e09f7c4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f2219745250f",
        "lessThan": "ff91cc12faf7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f2219745250f",
        "lessThan": "050bf3c793a0",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "security/keys/trusted-keys/trusted_tpm2.c"
    ],
    "versions": [
      {
        "version": "5.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.13",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.160",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.92",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.32",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.11",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.2",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]