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Test ID:1.3.6.1.4.1.25623.1.0.145413
Category:Buffer overflow
Title:ISC BIND Buffer Overflow Vulnerability (CVE-2020-8625) - Windows
Summary:ISC BIND is prone to a buffer overflow vulnerability in the GSSAPI security; policy negotiation.
Description:Summary:
ISC BIND is prone to a buffer overflow vulnerability in the GSSAPI security
policy negotiation.

Vulnerability Insight:
GSS-TSIG is an extension to the TSIG protocol which is intended to support
the secure exchange of keys for use in verifying the authenticity of communications between parties on a
network.

SPNEGO is a negotiation mechanism used by GSSAPI, the application protocol interface for GSS-TSIG.

The SPNEGO implementation used by BIND has been found to be vulnerable to a buffer overflow attack.

Vulnerability Impact:
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.

Affected Software/OS:
BIND 9.5.0 - 9.11.27, 9.12.0 - 9.16.11, 9.11.3-S1 - 9.11.27-S1 and
9.16.8-S1 - 9.16.11-S1.

Solution:
Update to version 9.11.28, 9.16.12, 9.11.28-S1, 9.16.12-S1 or later.

CVSS Score:
6.8

CVSS Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-8625
https://kb.isc.org/v1/docs/cve-2020-8625
Debian Security Information: DSA-4857 (Google Search)
https://www.debian.org/security/2021/dsa-4857
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QWCMBOSZOJIIET7BWTRYS3HLX5TSDKHX/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/
https://www.zerodayinitiative.com/advisories/ZDI-21-195/
https://lists.debian.org/debian-lts-announce/2021/02/msg00029.html
http://www.openwall.com/lists/oss-security/2021/02/19/1
http://www.openwall.com/lists/oss-security/2021/02/20/2
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