CVE-2021-21017

CVE Published	2021-02-11
Related CWE(s)	CWE-122: Heap-based Buffer Overflow, CWE-787: Out-of-bounds Write
Related Vendor(s)	adobe
Related Product(s)	acrobat_reader_dc, acrobat, acrobat_dc, acrobat_reader
Exploitation Reported (CISA KEV)	2021-11-03
CVSS 3 Base Score	8.8 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Forced Integer Overflow (CAPEC-92)

This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

References

CVE-2021-21017

Cyber Threat Graph Context

Associated CAPEC Patterns

Forced Integer Overflow (CAPEC-92)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities