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Poly Systems Dirty Cow Linux Kernel Impact

Vulnerability Summary

A high-severity vulnerability has been recently disclosed in most modern versions of the Linux kernel. This vulnerability could allow an attacker with non-root shell access to elevate their privileges to that of a root user. The vulnerability is known as “Dirty COW”.  

 

Details

CVE-2016-5195, aka “Dirty COW” 

Dirty COW attack against the Linux kernel – Dirty COW allows an attacker to exploit a race condition in the Linux kernel’s memory subsystem. This allows an unprivileged shell user to gain write access to otherwise read-only memory which in turn allows the attacker to potentially gain root privileges and control the system.

 

Published

Last Update: 3/11/2022
Initial Public Release: 10/26/2016
Advisory ID:  PLYGN16-06

CVE ID: CVE-2016-5195
CVSS Score: 7.8
CVSS: 3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Product Affected
PRODUCT STATUS
Media Manager – All versions Not vulnerable
CX5000 – All versions Not vulnerable
CX Product Line – All versions Not vulnerable
RealPresence Mobile – All versions Not vulnerable
RealPresence Desktop – All versions Not vulnerable
RealPresence Group Series – Allversions No shell available to non-privilegedusers to exploit Dirty Cow
RealPresence Touch – All versions No shell available to non-privilegedusers to exploit Dirty Cow
Poly Touch Control – All versions No shell available to non-privilegedusers to exploit Dirty Cow
HDX – All versions No shell available to non-privilegedusers to exploit Dirty Cow
Video Border Proxy (VBP) – Allversions No shell available to non-privilegedusers to exploit Dirty Cow
Video Border Proxy (VBP) – Allversions No shell available to non-privilegedusers to exploit Dirty Cow
ISDN Gateway – All versions No shell available to non-privilegedusers to exploit Dirty Cow
Poly Phones (VVX, SPIP, SSIP, Trio) – All versions No shell available to non-privilegedusers to exploit Dirty Cow
RealPresence Debut – All versions No shell available to non-privilegedusers to exploit Dirty Cow
RealAccess – All versions No shell available to non-privilegedusers to exploit Dirty Cow
Video Border Proxy (VBP) – Allversions No shell available to non-privilegedusers to exploit Dirty Cow
RealPresence Resource Manager – Allversions No shell available to non-privilegedusers to exploit Dirty Cow
RealPresence DMA – All versions No shell available to non-privilegedusers to exploit Dirty Cow
RealPresence Access Director – Allversions No shell available to non-privilegedusers to exploit Dirty Cow
Solution

Poly recommends that customers disable telnet/ssh shell access for all products.

Furthermore, Poly recommends that customer evaluate network access control lists, firewalls, and other network protections to ensure that they have been deployed in a manner that is consistent with security best practices.

The risk presented by this potential vulnerability to Poly products, as well as other networked devices, may be mitigated by these controls. Customers should also ensure that Poly products have been configured as recommended by Poly implementation guides. Customers may wish to implement additional event monitoring and review until such time that an update is installed.

 

Workaround

There is no workaround.

Contact

Any customer using an affected system who is concerned about this vulnerability within their deployment should contact Poly Technical Support(888) 248-4143, (916) 928-7561, or visit the Poly Support Site.

 

Revision History
VERSION DATE DESCRIPTION
1.0 10/26/2016 Original publication
1.1 11/3/2016 Additional Details / Acknowledgement
2.0 3/11/2022 Format Changes

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