Summaryinfo

A vulnerability has been found in ISC BIND up to 9.12.4/9.13.x/9.14.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file query.c of the component nxdomain Redirect Handler. The manipulation leads to assertion. This vulnerability is known as CVE-2019-6467. Attacking locally is a requirement. There is no exploit available. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability, which was classified as problematic, was found in ISC BIND up to 9.12.4/9.13.x/9.14.0 (Domain Name Software). Affected is some unknown functionality of the file query.c of the component nxdomain Redirect Handler. The manipulation with an unknown input leads to a assertion vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally. The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible. Versions affected: BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch.

The bug was discovered 04/24/2019. The weakness was disclosed 10/09/2019 (Website). The advisory is shared for download at kb.isc.org. This vulnerability is traded as CVE-2019-6467 since 01/16/2019. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

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.

The entries VDB-143295, VDB-143294, VDB-143293 and VDB-143291 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Domain Name Software

Vendor

• ISC

Name

• BIND

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.12.0
• 9.12.1
• 9.12.2
• 9.12.3
• 9.12.4
• 9.13
• 9.14.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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