CVE-2020-6113: gonitro nitro_pro Integer Overflow or Wraparound

Vulnerability summary

CVE-2020-6113 is a high (CVSS 8.8) Integer Overflow or Wraparound vulnerability in gonitro nitro_pro. EPSS estimates a 64.14% chance of exploitation in the next 30 days, higher than 99.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 17-09-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

An exploitable vulnerability exists in the object stream parsing functionality of Nitro Software, Inc.’s Nitro Pro 13.13.2.242 when updating its cross-reference table. When processing an object stream from a PDF document, the application will perform a calculation in order to allocate memory for the list of indirect objects. Due to an error when calculating this size, an integer overflow may occur which can result in an undersized buffer being allocated. Later when initializing this buffer, the application can write outside its bounds which can cause a memory corruption that can lead to code execution. A specially crafted document can be delivered to a victim in order to trigger this vulnerability.

• 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.
• CWE-131Incorrect Calculation of Buffer SizeThe product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.