CVE Vulnerabilities

CVE-2011-3021

Use After Free

Published: Feb 16, 2012 | Modified: Apr 16, 2020
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

Use-after-free vulnerability in Google Chrome before 17.0.963.56 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to subframe loading.

Weakness

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

Affected Software

Name Vendor Start Version End Version
Chrome Google * 17.0.963.56 (excluding)
Chromium-browser Ubuntu devel *
Chromium-browser Ubuntu lucid *
Chromium-browser Ubuntu maverick *
Chromium-browser Ubuntu natty *
Chromium-browser Ubuntu oneiric *
Chromium-browser Ubuntu precise *
Chromium-browser Ubuntu quantal *
Chromium-browser Ubuntu raring *
Chromium-browser Ubuntu saucy *
Chromium-browser Ubuntu trusty *
Chromium-browser Ubuntu utopic *
Chromium-browser Ubuntu vivid *
Chromium-browser Ubuntu wily *
Chromium-browser Ubuntu xenial *
Chromium-browser Ubuntu yakkety *
Qtwebkit-source Ubuntu devel *
Qtwebkit-source Ubuntu esm-apps/xenial *
Qtwebkit-source Ubuntu maverick *
Qtwebkit-source Ubuntu natty *
Qtwebkit-source Ubuntu oneiric *
Qtwebkit-source Ubuntu precise *
Qtwebkit-source Ubuntu quantal *
Qtwebkit-source Ubuntu raring *
Qtwebkit-source Ubuntu saucy *
Qtwebkit-source Ubuntu trusty *
Qtwebkit-source Ubuntu utopic *
Qtwebkit-source Ubuntu vivid *
Qtwebkit-source Ubuntu wily *
Qtwebkit-source Ubuntu xenial *
Qtwebkit-source Ubuntu yakkety *
Webkit Ubuntu hardy *
Webkit Ubuntu lucid *
Webkit Ubuntu maverick *
Webkit Ubuntu natty *
Webkit Ubuntu oneiric *
Webkit Ubuntu precise *
Webkit Ubuntu quantal *
Webkit Ubuntu raring *
Webkit Ubuntu saucy *
Webkitgtk Ubuntu utopic *
Webkitgtk Ubuntu vivid *

Extended Description

The use of previously-freed memory can have any number of adverse consequences, ranging from the corruption of valid data to the execution of arbitrary code, depending on the instantiation and timing of the flaw. The simplest way data corruption may occur involves the system’s reuse of the freed memory. Use-after-free errors have two common and sometimes overlapping causes:

In this scenario, the memory in question is allocated to another pointer validly at some point after it has been freed. The original pointer to the freed memory is used again and points to somewhere within the new allocation. As the data is changed, it corrupts the validly used memory; this induces undefined behavior in the process. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.

Potential Mitigations

References