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[email protected]CVE-2021-3520

HistoryJun 02, 2021 - 1:15 p.m.

CVE-2021-3520

2021-06-0213:15:13

CWE-190

CWE-787

[email protected]

web.nvd.nist.gov

499

cve-2021-3520

lz4

integer overflow

out-of-bounds write

memmove

availability issue

confidentiality impact

integrity impact

nvd

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

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

9.3 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

51.0%

JSON

There’s a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

Affected configurations

Vulners

NVD

Node

lz4_projectlz4Range≤1.8.3

VendorProductVersionCPE
lz4_projectlz4*cpe:2.3:a:lz4_project:lz4:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
lz4_project	lz4	*	cpe:2.3:a:lz4_project:lz4::::::::

CNA Affected

[
  {
    "product": "lz4",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "lz4-1.8.3"
      }
    ]
  }
]