ISC BIND up to 9.10.8-P1/9.11.5-P1/9.12.3-P1 EDNS Option Messages release of resource

Summaryinfo

A vulnerability was found in ISC BIND up to 9.10.8-P1/9.11.5-P1/9.12.3-P1. It has been rated as problematic. Affected by this issue is some unknown functionality of the component EDNS Option Handler. Performing a manipulation as part of Messages results in release of resource. This vulnerability is cataloged as CVE-2018-5744. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in ISC BIND up to 9.10.8-P1/9.11.5-P1/9.12.3-P1 (Domain Name Software). This affects an unknown function of the component EDNS Option Handler. The manipulation as part of a Messages leads to a release of resource vulnerability. CWE is classifying the issue as CWE-772. The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. This is going to have an impact on availability. The summary by CVE is:

A failure to free memory can occur when processing messages having a specific combination of EDNS options. Versions affected are: BIND 9.10.7 -> 9.10.8-P1, 9.11.3 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.10.7-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected.

The bug was discovered 02/21/2019. The weakness was shared 10/09/2019 (Website). It is possible to read the advisory at kb.isc.org. This vulnerability is uniquely identified as CVE-2018-5744 since 01/17/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/20/2024). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 230 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277630 (Fedora Security Update for bind.P4 (FEDORA-2019-5396a60397)).

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

The entries VDB-143200 and VDB-143198 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Domain Name Software

Vendor

• ISC

Name

• BIND

Version

• 9.10.8-P1
• 9.11.5-P1
• 9.12.3-P1

License

• open-source

Website

• Vendor: https://www.isc.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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