CVE-2020-8625 A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack

2021-02-1700:00:00

isc

www.cve.org

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.3 High

AI Score

Confidence

High

0.187 Low

EPSS

Percentile

96.3%

JSON

BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND’s default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch

CNA Affected

[
  {
    "product": "BIND9",
    "vendor": "ISC",
    "versions": [
      {
        "status": "affected",
        "version": "Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.28"
      },
      {
        "status": "affected",
        "version": "Open Source Branches 9.12 though 9.16 9.12.0 through versions before 9.16.12"
      },
      {
        "status": "affected",
        "version": "Supported Preview Branch 9.11-S 9.11.3-S1 through versions before 9.11.28-S1"
      },
      {
        "status": "affected",
        "version": "Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.12-S1"
      },
      {
        "status": "affected",
        "version": "Development Branch 9.17 9.17.0 through versions before 9.17.2"
      }
    ]
  }
]