Multiple vulnerabilities in Windows Win32k.sys driver

Published: 2016-08-10
Severity Low
Patch available YES
Number of vulnerabilities 4
CVE ID CVE-2016-3311
CVE-2016-3310
CVE-2016-3309
CVE-2016-3308
CWE ID CWE-119
Exploitation vector Local
Public exploit Public exploit code for vulnerability #3 is available.
Vulnerable software Windows Subscribe
Windows Server
Vendor Microsoft

Security Advisory

Discovered vulnerabilities may allow a local user to elevate privileges on vulnerable system.

1) Elevation of privilege

Severity: Low

CVSSv3: 7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-3311

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

The vulnerability allows a local user to gain elevated privileges on vulnerable system.

The vulnerability exists due to boundary error in Win32k.sys driver when handling objects in memory. A local user can trigger buffer overflow and execute arbitrary code with SYSTEM privileges.

Successful exploitation of this vulnerability will allow a local user to gain complete access to vulnerable system.

Vulnerable software versions

Windows: 7, 8.1, 10, RT 8.1, Vista

Windows Server: 2008, 2008 R2, 2012, 2012 R2

CPE External links

https://technet.microsoft.com/en-us/library/security/ms16-098.aspx

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Elevation of privilege

Severity: Low

CVSSv3: 7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-3310

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

The vulnerability allows a local user to gain elevated privileges on vulnerable system.

The vulnerability exists due to boundary error in Win32k.sys driver when handling objects in memory. A local user can trigger buffer overflow and execute arbitrary code with SYSTEM privileges.

Successful exploitation of this vulnerability will allow a local user to gain complete access to vulnerable system.

Vulnerable software versions

Windows: 7, 8.1, 10, RT 8.1, Vista

Windows Server: 2008, 2008 R2, 2012, 2012 R2

CPE External links

https://technet.microsoft.com/en-us/library/security/ms16-098.aspx

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Elevation of privilege

Severity: Low

CVSSv3: 7.9 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-3309

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

The vulnerability allows a local user to gain elevated privileges on vulnerable system.

The vulnerability exists due to boundary error in Win32k.sys driver when handling objects in memory. A local user can trigger buffer overflow and execute arbitrary code with SYSTEM privileges.

Successful exploitation of this vulnerability will allow a local user to gain complete access to vulnerable system.

Vulnerable software versions

Windows: 7, 8.1, 10, RT 8.1, Vista

Windows Server: 2008, 2008 R2, 2012, 2012 R2

CPE External links

https://technet.microsoft.com/en-us/library/security/ms16-098.aspx

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

4) Elevation of privilege

Severity: Low

CVSSv3: 7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-3308

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

The vulnerability allows a local user to gain elevated privileges on vulnerable system.

The vulnerability exists due to boundary error in Win32k.sys driver when handling objects in memory. A local user can trigger buffer overflow and execute arbitrary code with SYSTEM privileges.

Successful exploitation of this vulnerability will allow a local user to gain complete access to vulnerable system.

Vulnerable software versions

Windows: 7, 8.1, 10, RT 8.1, Vista

Windows Server: 2008, 2008 R2, 2012, 2012 R2

CPE External links

https://technet.microsoft.com/en-us/library/security/ms16-098.aspx

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.