CVE-2018-18650: xpdfreader xpdf Integer Overflow or Wraparound

Vulnerability summary

CVE-2018-18650 is a medium (CVSS 5.5) Integer Overflow or Wraparound vulnerability in xpdfreader xpdf. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 59.7% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 25-10-2018
   PublishedVulnerability first disclosed.
2. 17-09-2024
   Last modifiedVulnerability information updated.

Description

An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.

• 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.