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

Quick assessment

Affected
ISC BIND9
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 存在安全漏洞，该漏洞源于通过显式地为tkey-gssapi-keytab或tkey-gssapi-credentialconfiguration选项设置有效值，服务器可能会变得脆弱。

CVSS 8.1 · High EPSS 64.16% · P99
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I. Basic Information for CVE-2020-8625

Vulnerability Information
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Vulnerability Title
A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 存在安全漏洞，该漏洞源于通过显式地为tkey-gssapi-keytab或tkey-gssapi-credentialconfiguration选项设置有效值，服务器可能会变得脆弱。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ISC BIND9 Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.28 -

II. Public POCs for CVE-2020-8625

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III. Intelligence Information for CVE-2020-8625

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Vendor Advisories for CVE-2020-8625 (4)

Mailing List Discussions for CVE-2020-8625 (5)

Other References for CVE-2020-8625 (1)

IV. Related Vulnerabilities

Same product: BIND9
Same vendor: ISC

V. Comments for CVE-2020-8625

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