CVE-2020-27754: debian debian_linux Integer Overflow or Wraparound

Vulnerability summary

CVE-2020-27754 is a medium (CVSS 4.3) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 08-12-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

In IntensityCompare() of /magick/quantize.c, there are calls to PixelPacketIntensity() which could return overflowed values to the caller when ImageMagick processes a crafted input file. To mitigate this, the patch introduces and uses the ConstrainPixelIntensity() function, which forces the pixel intensities to be within the proper bounds in the event of an overflow. This flaw affects ImageMagick versions prior to 6.9.10-69 and 7.0.8-69.

• 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.