2020-19716 | Exiv2 types.cpp Databuf buffer overflow

By Max On Jul 18, 2021

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.0	$0-$5k	0.22

A vulnerability has been found in Exiv2 0.27.1 (Image Processing Software) and classified as problematic. This vulnerability affects the function Databuf of the file types.cpp. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-120. As an impact it is known to affect availability. CVE summarizes:

A buffer overflow vulnerability in the Databuf function in types.cpp of Exiv2 v0.27.1 leads to a denial of service (DOS).

The weakness was released 07/14/2021. The advisory is shared for download at github.com. This vulnerability was named CVE-2020-19716 since 08/13/2020. The exploitation appears to be easy. The attack needs to be done within the local network. A single authentication is necessary for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/18/2021).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Type