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Vulnerability Details : CVE-2020-8616

A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
Publish Date : 2020-05-19 Last Update Date : 2020-10-20
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 400

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:2338: bind security update (Important) oval:com.redhat.rhsa:def:20202338 unix
RHSA-2020:2344: bind security update (Important) oval:com.redhat.rhsa:def:20202344 unix
RHSA-2020:2383: bind security update (Important) oval:com.redhat.rhsa:def:20202383 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-8616

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 Application ISC Bind * * * * Version Details Vulnerabilities
4 Application ISC Bind 9.9.3 S1 * * Version Details Vulnerabilities
5 Application ISC Bind 9.10.5 S1 * * Version Details Vulnerabilities
6 Application ISC Bind 9.10.7 S1 * * Version Details Vulnerabilities
7 Application ISC Bind 9.11.3 S1 * * Version Details Vulnerabilities
8 Application ISC Bind 9.11.5 S3 * * Version Details Vulnerabilities
9 Application ISC Bind 9.11.5 S5 * * Version Details Vulnerabilities
10 Application ISC Bind 9.11.6 S1 * * Version Details Vulnerabilities
11 Application ISC Bind 9.11.7 S1 * * Version Details Vulnerabilities
12 Application ISC Bind 9.11.8 S1 * * Version Details Vulnerabilities
13 Application ISC Bind 9.12.4 P1 * * Version Details Vulnerabilities
14 Application ISC Bind 9.12.4 P2 * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 2
ISC Bind 12

- References For CVE-2020-8616

http://www.nxnsattack.com
https://kb.isc.org/docs/cve-2020-8616 CONFIRM
http://www.openwall.com/lists/oss-security/2020/05/19/4
MLIST [oss-security] 20200519 Two vulnerabilities disclosed in BIND (CVE-2020-8616 and CVE-2020-8617)
https://www.debian.org/security/2020/dsa-4689
DEBIAN DSA-4689
https://security.netapp.com/advisory/ntap-20200522-0002/ CONFIRM
https://usn.ubuntu.com/4365-2/
UBUNTU USN-4365-2
https://www.synology.com/security/advisory/Synology_SA_20_12 CONFIRM
https://usn.ubuntu.com/4365-1/
UBUNTU USN-4365-1
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
MLIST [debian-lts-announce] 20200530 [SECURITY] [DLA 2227-1] bind9 security update
https://lists.fedoraproject.org/archives/list/[email protected]/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
FEDORA FEDORA-2020-2d89cbcfd9
https://lists.fedoraproject.org/archives/list/[email protected]/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
FEDORA FEDORA-2020-f9dcd4e9d5
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
SUSE openSUSE-SU-2020:1699
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
SUSE openSUSE-SU-2020:1701

- Metasploit Modules Related To CVE-2020-8616

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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