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Test ID:1.3.6.1.4.1.25623.1.0.144439
Category:General
Title:ISC BIND update-policy Enforcement Vulnerability - CVE-2020-8624 (Linux)
Summary:ISC BIND is prone to a vulnerability where update-policy rules of type; 'subdomain' are enforced incorrectly.
Description:Summary:
ISC BIND is prone to a vulnerability where update-policy rules of type
'subdomain' are enforced incorrectly.

Vulnerability Insight:
Change 4885 inadvertently caused 'update-policy' rules of type 'subdomain' to
be treated as if they were of type 'zonesub', allowing updates to all parts of the zone along with the intended
subdomain.

Vulnerability Impact:
An attacker who has been granted privileges to change a specific subset of the
zone's content could abuse these unintended additional privileges to update other contents of the zone.

Affected Software/OS:
BIND 9.9.12 - 9.9.13, 9.10.7 - 9.10.8, 9.11.3 - 9.11.21, 9.12.1 - 9.16.5,
9.17.0 - 9.17.3, also affects 9.9.12-S1 - 9.9.13-S1 and 9.11.3-S1 - 9.11.21-S1.

Solution:
Update to version 9.11.22, 9.16.6, 9.17.4, 9.11.22-S1 or later.

CVSS Score:
4.0

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-8624
https://kb.isc.org/docs/cve-2020-8624
Debian Security Information: DSA-4752 (Google Search)
https://www.debian.org/security/2020/dsa-4752
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZKAMJZXR66P6S5LEU4SN7USSNCWTXEXP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DQN62GBMCIC5AY4KYADGXNKVY6AJKSJE/
https://security.gentoo.org/glsa/202008-19
https://usn.ubuntu.com/4468-1/
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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