#VU638 Memory corruption in Apple Inc. products - CVE-2016-2108

Vulnerability identifier: #VU638

Vulnerability risk: High

CVSSv4.0: 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

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
OpenSSL
Oracle Solaris
Oracle Linux
macOS
Oracle Exalogic Infrastructure

Software vendor:
OpenSSL Software Foundation
Oracle
Apple Inc.

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.

Update 1.0.2 to 1.0.2c.
Update 1.0.1 to 1.0.1c.

• https://www.openssl.org/news/secadv/20160503.txt
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
• http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
• https://support.apple.com/cs-cz/HT206903