Linux Kernel up to 4.13.11 lmedm04.c input validation

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 4.13.11. Affected is an unknown function of the file drivers/media/usb/dvb-usb-v2/lmedm04.c. This manipulation causes input validation. This vulnerability is handled as CVE-2017-16538. It is possible to launch the attack on the local host. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.13.11 (Operating System). It has been declared as critical. Affected by this vulnerability is an unknown code of the file drivers/media/usb/dvb-usb-v2/lmedm04.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

drivers/media/usb/dvb-usb-v2/lmedm04.c in the Linux kernel through 4.13.11 allows local users to cause a denial of service (general protection fault and system crash) or possibly have unspecified other impact via crafted system calls, related to a missing warm-start check and incorrect attach timing (dm04_lme2510_frontend_attach versus dm04_lme2510_tuner).

The bug was discovered 09/26/2017. The weakness was released 11/04/2017 (Website). The advisory is shared at groups.google.com. This vulnerability is known as CVE-2017-16538 since 11/03/2017. An attack has to be approached locally. A single authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 38 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 104536 (Fedora 26 : kernel (2017-31d7720d7e)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276995 (Fedora Security Update for kernel (FEDORA-2017-31d7720d7e)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (104536). Entries connected to this vulnerability are available at VDB-109128, VDB-109129, VDB-109130 and VDB-109131. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.13.0
• 4.13.1
• 4.13.2
• 4.13.3
• 4.13.4
• 4.13.5
• 4.13.6
• 4.13.7
• 4.13.8
• 4.13.9
• 4.13.10
• 4.13.11

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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