CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.5 | $0-$5k | 0.00 |
A vulnerability was found in ISC BIND up to 9.16.5/9.17.3 (Domain Name Software). It has been declared as problematic. Affected by this vulnerability is an unknown code of the component TCP Handler. The manipulation as part of a TCP Connection leads to a assertion vulnerability. The CWE definition for the vulnerability is CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. As an impact it is known to affect availability. The summary by CVE is:
In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.
The weakness was released 08/21/2020 (Website). It is possible to read the advisory at kb.isc.org. This vulnerability is known as CVE-2020-8620 since 02/05/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.
Upgrading to version 9.16.6 or 9.17.4 eliminates this vulnerability.
Entries connected to this vulnerability are available at 160175, 160174, 160173 and 160172.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.8VulDB Meta Temp Score: 6.7
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
Vendor Base Score (ISC): 7.5
Vendor Vector (ISC): 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: AssertionCWE: CWE-617
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: BIND 9.16.6/9.17.4
Timeline
02/05/2020 🔍08/21/2020 🔍
08/22/2020 🔍
11/10/2020 🔍
Sources
Vendor: isc.orgAdvisory: kb.isc.org
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2020-8620 (🔍)
See also: 🔍
Entry
Created: 08/22/2020 09:22Updated: 11/10/2020 23:45
Changes: 08/22/2020 09:22 (50), 08/22/2020 09:27 (12), 11/10/2020 23:38 (1), 11/10/2020 23:45 (1)
Complete: 🔍
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