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CVE-2020-8616
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
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..
CVSSv2.0 Score
- Severity
- Medium
- Base Score
- 5/10
- Exploit Score
- 10/10
- Access Vector
- Network
- Access Complexity
- Low
- Authentication Required
- None
- Impact Score
- 2.9/10
- Confidentiality Impact
- None
- Availability Impact
- Partial
- Integrity Impact
- None
CVSSv3.1 Score
- Severity
- High
- Base Score
- 8.6/10
- Exploit Score
- 3.9/10
- Access Vector
- Network
- Access Complexity
- Low
- Privileges Required
- None
- Impact Score
- 4/10
- Confidentiality Impact
- None
- Availability Impact
- High
- Integrity Impact
- None
- Scope
- Changed
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.12.0 | - | |
cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.13.0 | - | |
cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.17.0 | - | |
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.16.0 | - | |
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.14.0 | - | |
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.0.0 | - | |
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* |
Yes
|
9.15.0 | - | |
cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
Yes
|
- | - |
References
- http://www.nxnsattack.com
- https://kb.isc.org/docs/cve-2020-8616
- http://www.openwall.com/lists/oss-security/2020/05/19/4
- https://www.debian.org/security/2020/dsa-4689
- https://security.netapp.com/advisory/ntap-20200522-0002/
- https://usn.ubuntu.com/4365-2/
- https://www.synology.com/security/advisory/Synology_SA_20_12
- https://usn.ubuntu.com/4365-1/
- https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org