CVE Vulnerabilities

CVE-2019-8251

Access of Resource Using Incompatible Type ('Type Confusion')

Published: Jul 06, 2020 | Modified: Sep 08, 2021
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu

Adobe Acrobat and Reader versions 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier, 2015.006.30497 and earlier, and 2015.006.30498 and earlier have a type confusion vulnerability. Successful exploitation could lead to information disclosure.

Weakness

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Affected Software

Name Vendor Start Version End Version
Acrobat_dc Adobe 15.006.30060 (including) 15.006.30498 (including)
Acrobat_dc Adobe 15.008.20082 (including) 19.012.20035 (including)
Acrobat_dc Adobe 17.011.30059 (including) 17.011.30143 (including)
Acrobat_reader_dc Adobe 15.006.30060 (including) 15.006.30498 (including)
Acrobat_reader_dc Adobe 15.008.20082 (including) 19.012.20035 (including)
Acrobat_reader_dc Adobe 17.011.30059 (including) 17.011.30143 (including)

Extended Description

When the product accesses the resource using an incompatible type, this could trigger logical errors because the resource does not have expected properties. In languages without memory safety, such as C and C++, type confusion can lead to out-of-bounds memory access. While this weakness is frequently associated with unions when parsing data with many different embedded object types in C, it can be present in any application that can interpret the same variable or memory location in multiple ways. This weakness is not unique to C and C++. For example, errors in PHP applications can be triggered by providing array parameters when scalars are expected, or vice versa. Languages such as Perl, which perform automatic conversion of a variable of one type when it is accessed as if it were another type, can also contain these issues.

References