CVE-2021-33640

2022-12-1916:15:10

CWE-416

[email protected]

web.nvd.nist.gov

cve-2021-33640

libtar.c

use-after-free

memory release

security vulnerability

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.1 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

56.7%

JSON

After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t->th_buf) . As a result, the released memory is used (use-after-free).

Affected configurations

NVD

Node

huaweiopeneulerMatch20.03sp1lts

huaweiopeneulerMatch20.03sp2lts

huaweiopeneulerMatch22.03lts

Node

fedoraprojectfedoraMatch36

fedoraprojectfedoraMatch37

CPENameOperatorVersion
huawei:openeulerhuawei openeulereq20.03
huawei:openeulerhuawei openeulereq22.03

CPE	Name	Operator	Version
huawei:openeuler	huawei openeuler	eq	20.03
huawei:openeuler	huawei openeuler	eq	22.03

CNA Affected

[
  {
    "vendor": "openEuler",
    "product": "openEuler 22.03 LTS",
    "versions": [
      {
        "version": " libtar 1.2.20-21",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "openEuler",
    "product": "openEuler 20.03 LTS SP1",
    "versions": [
      {
        "version": " libtar 1.2.20-19",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "openEuler",
    "product": "openEuler 20.03 LTS SP3",
    "versions": [
      {
        "version": " libtar 1.2.20-19",
        "status": "affected"
      }
    ]
  }
]