CVE-2023-52669 crypto: s390/aes - Fix buffer overread in CTR mode

2024-05-1714:01:57

Linux

github.com

cve-2023-52669

crypto

s390/aes

buffer overread

ctr mode

linux kernel

vulnerability

resolved

buffer

data

length

AI Score

7.2

Confidence

Low

EPSS

Percentile

10.3%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

crypto: s390/aes - Fix buffer overread in CTR mode

When processing the last block, the s390 ctr code will always read
a whole block, even if there isn’t a whole block of data left. Fix
this by using the actual length left and copy it into a buffer first
for processing.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "0200f3ecc196",
        "lessThan": "cd51e26a3b89",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0200f3ecc196",
        "lessThan": "a7f580cdb42e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0200f3ecc196",
        "lessThan": "dbc9a791a70e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0200f3ecc196",
        "lessThan": "d68ac38895e8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0200f3ecc196",
        "lessThan": "e78f1a43e72d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0200f3ecc196",
        "lessThan": "d07f951903fa",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "arch/s390/crypto/aes_s390.c",
      "arch/s390/crypto/paes_s390.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.0",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "5.10.210",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.149",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.76",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.15",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7.3",
        "versionType": "custom",
        "lessThanOrEqual": "6.7.*"
      },
      {
        "status": "unaffected",
        "version": "6.8",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "arch/s390/crypto/aes_s390.c",
      "arch/s390/crypto/paes_s390.c"
    ],
    "defaultStatus": "affected"
  }
]