High severity · published May 19, 2020
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…
8.6
CVSS
11%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)11.0% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
Bind · Isc
9.0.0 through 9.11.18; 9.12.0 through 9.12.4; 9.13.0 through 9.13.7; 9.14.0 through 9.14.11; 9.15.0 through 9.15.6; 9.16.0 through 9.16.2; +12 more · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8616
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8616
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
Exploit
http://www.nxnsattack.com
Mailing List
http://www.openwall.com/lists/oss-security/2020/05/19/4
Patch
https://kb.isc.org/docs/cve-2020-8616
lists.debian.org
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
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