CVE-2014-0930 - Kernel Memory Leak And Denial Of Service Condition in IBM AIX

2014-05-07T00:00:00
ID SECURITYVULNS:DOC:30699
Type securityvulns
Reporter Securityvulns
Modified 2014-05-07T00:00:00

Description

Vulnerability title: Kernel Memory Leak And Denial Of Service Condition in IBM AIX CVE: CVE-2014-0930 Vendor: IBM Product: AIX Affected version: 5.3, 6.1 and 7.1 releases VIOS 2.2.* Fixed version: Interim version Reported by: Tim Brown

Details:

It has been identified that the ptrace() system call can be manipulated by an unprivileged user into leaking uninitialised kernel memory and that the method by which this is achieved may also lead to a denial of service condition. This can be achieved by manipulating the parameters that are passed to the ptrace() system call when performing the PT_LDINFO operation.

By calling ptrace(PT_LDINFO, childpid, leakbuffer, maximumleak, NULL) with a value of maximumleak that greater than that required for the expected result of the PT_LDINFO operation, the AIX kernel will xmalloc() this space (without initialising it), populate it and then perform a copy operation that returns the result within leakbuffer.

Further details at: https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-0930/

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