CVE-2021-30354: amazon kindle_firmware Integer Overflow to Buffer Overflow

Vulnerability summary

CVE-2021-30354 is a high (CVSS 9.3) Integer Overflow to Buffer Overflow vulnerability in amazon kindle_firmware. EPSS estimates a 8.40% chance of exploitation in the next 30 days, higher than 94.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 01-09-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

Amazon Kindle e-reader prior to and including version 5.13.4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function CJBig2Image::expand() and results in a memory corruption that leads to code execution when parsing a crafted PDF book.

• CWE-680Integer Overflow to Buffer OverflowThe product performs a calculation to determine how much memory to allocate, but an integer overflow can occur that causes less memory to be allocated than expected, leading to a buffer overflow.
• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.