Remote code execution in Dell EMC iDRAC

1) Memory corruption

EUVDB-ID: #VU638

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-2108

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote user to cause memory corruption on the target system.

The weakness exists due to buffer underflow with an out-of-bounds write in i2c_ASN1_INTEGER. As ASN.1 parser (specifically, d2i_ASN1_TYPE) can misinterpret a large universal tag as a negative zero value, attacker may easily corrupt memory.

Successful exploitation of the vulnerability will allow a malicious user to trigger memory corruption on the vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

iDRAC6: 1.0 - 3.75

iDRAC8: 2.00.00.00 - 2.23.23.21

iDRAC7: 2.10.10.10 - 2.22.22.22

CPE2.3

• cpe:2.3:a:dell:idrac6:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac6:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac6:1.2:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac8:2.00.00.00:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac8:2.02.01.01:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac8:2.04.02.01:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac7:2.10.10.10:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac7:2.13.13.12:*:*:*:*:*:*:*
• cpe:2.3:a:dell:idrac7:2.15.10.10:*:*:*:*:*:*:*

External links

https://downloads.dell.com/solutions/dell-management-solution-resources/Dell%20iDRAC%20Response%20to%20CVE-2016-2108%20%2018%20May%202016.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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