Linux Kernel up to 4.14.8 Register kernel/bpf/verifier.c memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 4.14.8. This impacts an unknown function of the file kernel/bpf/verifier.c of the component Register Handler. This manipulation causes memory corruption. This vulnerability appears as CVE-2017-16996. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.14.8 (Operating System). Affected by this vulnerability is some unknown functionality of the file kernel/bpf/verifier.c of the component Register Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging register truncation mishandling.

The bug was discovered 12/18/2017. The weakness was presented 12/27/2017 (Website). It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2017-16996 since 11/27/2017. Attacking locally is a requirement. A single authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/19/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k.

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 102267†). See VDB-111042 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.14.0
• 4.14.1
• 4.14.2
• 4.14.3
• 4.14.4
• 4.14.5
• 4.14.6
• 4.14.7
• 4.14.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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