ISC BIND up to 9.11.6-S1 EDNS Client Subnet Response input validation

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$5k-$25k0.06

A vulnerability was found in ISC BIND up to 9.11.6-S1 (Domain Name Software) and classified as critical. Affected by this issue is an unknown code of the component EDNS Client Subnet Handler. The manipulation as part of a Response leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-20. Impacted is availability. CVE summarizes:

An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition.

The weakness was shared 10/09/2019 (Website). The advisory is available at kb.isc.org. This vulnerability is handled as CVE-2019-6469 since 01/16/2019. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/30/2020).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries 143295, 143293, 143292 and 143291 are related to this item.

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VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat: 🔍
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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfoedit

01/16/2019 🔍
10/09/2019 +266 days 🔍
10/10/2019 +1 days 🔍
09/30/2020 +356 days 🔍

Sourcesinfoedit

Vendor: https://www.isc.org/

Advisory: kb.isc.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-6469 (🔍)
See also: 🔍

Entryinfoedit

Created: 10/10/2019 11:01 AM
Updated: 09/30/2020 06:54 AM
Changes: (1) advisory_confirm_url
Complete: 🔍

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