Ubuntu Linux 14.04 LTS Kernel Package 3.16.0-28 /dev/zero integer overflow

Summaryinfo

A vulnerability was found in Ubuntu Linux 14.04 LTS. It has been classified as critical. This vulnerability affects unknown code of the file /dev/zero of the component Kernel Package 3.16.0-28. Performing a manipulation results in integer overflow. This vulnerability is identified as CVE-2017-7286. The attack is only possible with local access. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Ubuntu Linux 14.04 LTS (Operating System). This affects an unknown code block of the file /dev/zero of the component Kernel Package 3.16.0-28. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The Linux kernel package 3.16.0-28 on Ubuntu 14.04 LTS mishandles a series of mmap system calls for /dev/zero with different starting addresses, with a stated impact of "allowing for a local user to possibly gain root access," aka an "inode integer overflow."

The weakness was released 04/10/2017 (Website). It is possible to read the advisory at packetstormsecurity.com. This vulnerability is uniquely identified as CVE-2017-7286 since 03/27/2017. Attacking locally is a requirement. The requirement for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/28/2022).

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

Entry connected to this vulnerability is available at VDB-99532. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Ubuntu

Name

• Linux

Version

• 14.04 LTS

License

• open-source

Website

• Vendor: https://www.ubuntu.com/

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

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