CVE Vulnerabilities

CVE-2018-16011

Use After Free

Published: Jan 18, 2019 | Modified: Aug 21, 2019
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

Adobe Acrobat and Reader versions 2019.010.20064 and earlier, 2019.010.20064 and earlier, 2017.011.30110 and earlier version, and 2015.006.30461 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.

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
Acrobat_dc Adobe 15.006.30060 15.006.30461
Acrobat_dc Adobe 15.008.20082 19.010.20064
Acrobat_dc Adobe 17.011.30056 17.011.30110
Acrobat_reader_dc Adobe 15.006.30060 15.006.30461
Acrobat_reader_dc Adobe 15.008.20082 19.010.20064
Acrobat_reader_dc Adobe 17.011.30059 17.011.30110

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