CVE-2015-7833
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Description
An out-of-bounds memory access flaw was found in the USBVision USB camera driver (usbvision_probe() function in drivers/media/usb/usbvision/usbvision-video.c). The driver assumes that the interfaces numbers of the USB device are always in 0,1,2,3... order. By using a specially crafted USB device which advertises an out-of-order number on one of its interfaces, an unprivileged user with physical access to the system can trigger a kernel NULL-pointer dereference causing a system freeze (denial of service).
Statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2.
This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Additional information
- Bugzilla 1270158: kernel: usbvision: crash on invalid USB device descriptors
- CWE-476: NULL Pointer Dereference
- FAQ: Frequently asked questions about CVE-2015-7833
Common Vulnerability Scoring System (CVSS) Score Details
Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
| Red Hat | NVD | |
|---|---|---|
CVSS v2 Base Score | 4 | 4.9 |
Attack Vector | Local | Local |
Access Complexity | High | Low |
Authentication | None | None |
Confidentiality Impact | None | None |
Integrity Impact | None | None |
Availability Impact | Complete | Complete |
CVSS v2 Vector
Red Hat: AV:L/AC:H/Au:N/C:N/I:N/A:C
NVD: AV:L/AC:L/Au:N/C:N/I:N/A:C
Acknowledgements
Red Hat would like to thank Ralf Spenneberg (OpenSource Security) for reporting this issue.
Frequently Asked Questions
Why is Red Hat's CVSS v3 score or Impact different from other vendors?
My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?
What can I do if my product is listed as "Will not fix"?
What can I do if my product is listed as "Fix deferred"?
What is a mitigation?
I have a Red Hat product but it is not in the above list, is it affected?
Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?
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