[CVE-2012-2674] Multiple integer overflows for Android

Original release date:07/25/2012

Last revised:07/26/2012

Source: US-CERT/NIST

Overview

Multiple integer overflows in the (1) chk_malloc, (2) leak_malloc, and (3) leak_memalign functions in libc/bionic/malloc_debug_leak.c in Bionic (libc) for Android, when libc.debug.malloc is set, make it easier for context-dependent attackers to perform memory-related attacks such as buffer overflows via a large size value, which causes less memory to be allocated than expected.

Android 환경에서 Bionic (libc) 내에 있는 libc/bionic/malloc_debug_leak.c 의 (1) chk_malloc, (2) leak_malloc, and (3) leak_memalign 함수의 Integer overflows

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:4.3 (MEDIUM) (AV:N/AC:M/Au:N/C:N/I:P/A:N) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 8.6

CVSS Version 2 Metrics:

Access Vector: Network exploitable

Access Complexity: Medium

Authentication: Not required to exploit

Impact Type:Allows unauthorized modification

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: https://github.com/android/platform_bionic/commit/7f5aa4f35e23fd37425b3a5041737cdf58f87385

Type: Patch Information; Exploit

Hyperlink: https://github.com/android/platform_bionic/commit/7f5aa4f35e23fd37425b3a5041737cdf58f87385

External Source: MLIST

Name: [oss-security] 20120607 Re: memory allocator upstream patches

Hyperlink:http://www.openwall.com/lists/oss-security/2012/06/07/13

External Source: MLIST

Name: [oss-security] 20120605 memory allocator upstream patches

Hyperlink: http://www.openwall.com/lists/oss-security/2012/06/05/1

External Source: MISC

Name: http://kqueue.org/blog/2012/03/05/memory-allocator-security-revisited/

Hyperlink: http://kqueue.org/blog/2012/03/05/memory-allocator-security-revisited/

Vulnerable software and versions

  Configuration 1

OR

* cpe:/a:google:bionic:::%7E%7E%7Eandroid%7E%7E

* Denotes Vulnerable Software

* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)

Numeric Errors (CWE-189)

CVE Standard Vulnerability Entry: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2674

[출처] : NIST(National Institute of Standards and Technology)