ISC BIND up to 9.11.5-S5 nxdomain Redirect assertion

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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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6.4$0-$5k0.00

A vulnerability has been found in ISC BIND up to 9.11.5-S5 (Domain Name Software) and classified as problematic. Affected by this vulnerability is an unknown part of the component nxdomain Redirect Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-617. As an impact it is known to affect availability. The summary by CVE is:

In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure. Versions affected: BIND Supported Preview Edition version 9.10.5-S1 -> 9.11.5-S5. ONLY BIND Supported Preview Edition releases are affected.

The bug was discovered 04/24/2019. The weakness was presented 10/09/2019 (Website). The advisory is shared at kb.isc.org. This vulnerability is known as CVE-2019-6468 since 01/16/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/29/2020).

The vulnerability was handled as a non-public zero-day exploit for at least 168 days. During that time the estimated underground price was around $5k-$25k.

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

See 143295, 143294, 143292 and 143291 for similar entries.

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VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Denial of service
CWE: CWE-617
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Countermeasuresinfoedit

Recommended: no mitigation known
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0-Day Time: 🔍

Timelineinfoedit

01/16/2019 🔍
04/24/2019 +98 days 🔍
10/09/2019 +168 days 🔍
10/10/2019 +1 days 🔍
09/29/2020 +355 days 🔍

Sourcesinfoedit

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

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

CVE: CVE-2019-6468 (🔍)
OSVDB: - ISC BIND nxdomain-redirect feature denial of service

See also: 🔍

Entryinfoedit

Created: 10/10/2019 11:00 AM
Updated: 09/29/2020 10:37 PM
Changes: (1) advisory_confirm_url
Complete: 🔍

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