CVE-2020-8616
CVSS V2 Medium 5
CVSS V3 High 8.6
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.
Overview
- CVE ID
- CVE-2020-8616
- Assigner
- security-officer@isc.org
- Vulnerability Status
- Modified
- Published Version
- 2020-05-19T14:15:11
- Last Modified Date
- 2020-10-20T12:15:13
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.0.0 | 9.11.18 |
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.12.0 | 9.12.4 |
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.13.0 | 9.13.7 |
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.14.0 | 9.14.11 |
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.15.0 | 9.15.6 |
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.16.0 | 9.16.2 |
| cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* | 1 | OR | 9.17.0 | 9.17.1 |
| cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 8.6
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 4
References
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-8616 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8616 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:23:07 | Added to TrackCVE | |||
| 2022-12-04 16:41:07 | 2020-05-19T14:15Z | 2020-05-19T14:15:11 | CVE Published Date | updated |
| 2022-12-04 16:41:07 | 2020-10-20T12:15:13 | CVE Modified Date | updated | |
| 2022-12-04 16:41:07 | Modified | Vulnerability Status | updated |