CVE-2018-20506: apple icloud Integer Overflow or Wraparound

Vulnerability summary

CVE-2018-20506 is a high (CVSS 8.1) Integer Overflow or Wraparound vulnerability in apple icloud. EPSS estimates a 7.50% chance of exploitation in the next 30 days, higher than 94.4% of scored vulnerabilities.

Timeline

1. 03-04-2019
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

SQLite before 3.25.3, when the FTS3 extension is enabled, encounters an integer overflow (and resultant buffer overflow) for FTS3 queries in a "merge" operation that occurs after crafted changes to FTS3 shadow tables, allowing remote attackers to execute arbitrary code by leveraging the ability to run arbitrary SQL statements (such as in certain WebSQL use cases). This is a different vulnerability than CVE-2018-20346.

• 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.