CVE-2021-39856 Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via LoadFile

2021-09-2915:39:35

CWE-200

adobe

www.cve.org

adobe

acrobat reader

information disclosure

ntlmv2

sso

loadfile

activex control

vulnerability

exploitation

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.6

Confidence

High

EPSS

0.003

Percentile

70.1%

JSON

Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.

CNA Affected

[
  {
    "product": "Acrobat Reader",
    "vendor": "Adobe",
    "versions": [
      {
        "lessThanOrEqual": "2020.004.30006",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "2017.011.30199",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "2021.005.20060",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "None",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]