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Test ID:1.3.6.1.4.1.25623.1.0.892227
Category:Debian Local Security Checks
Title:Debian LTS: Security Advisory for bind9 (DLA-2227-1)
Summary:The remote host is missing an update for the 'bind9'; package(s) announced via the DLA-2227-1 advisory.
Description:Summary:
The remote host is missing an update for the 'bind9'
package(s) announced via the DLA-2227-1 advisory.

Vulnerability Insight:
Several vulnerabilities were discovered in BIND, a DNS server
implementation.

CVE-2020-8616

It was discovered that BIND does not sufficiently limit the number
of fetches performed when processing referrals. An attacker can take
advantage of this flaw to cause a denial of service (performance
degradation) or use the recursing server in a reflection attack with
a high amplification factor.

CVE-2020-8617

It was discovered that a logic error in the code which checks TSIG
validity can be used to trigger an assertion failure, resulting in
denial of service.

Affected Software/OS:
'bind9' package(s) on Debian Linux.

Solution:
For Debian 8 'Jessie', these problems have been fixed in version
1:9.9.5.dfsg-9+deb8u19.

We recommend that you upgrade your bind9 packages.

CVSS Score:
5.0

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-8616
Debian Security Information: DSA-4689 (Google Search)
https://www.debian.org/security/2020/dsa-4689
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
http://www.nxnsattack.com
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
http://www.openwall.com/lists/oss-security/2020/05/19/4
https://usn.ubuntu.com/4365-1/
https://usn.ubuntu.com/4365-2/
Common Vulnerability Exposure (CVE) ID: CVE-2020-8617
http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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