CVE-2025-25186

Summary

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in net-imap's response parser. At any time while the client is connected, a malicious server can send can send highly compressed uid-set data which is automatically read by the client's receiver thread. The response parser uses Range#to_a to convert the uid-set data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory.

Affected Software

VendorProductVersion RangeStatus
rubynet-imap>= 0.3.2, < 0.3.8affected
rubynet-imap>= 0.4.0, < 0.4.19affected
rubynet-imap>= 0.5.0, < 0.5.6affected

Weaknesses

  • CWE-400: CWE-400: Uncontrolled Resource Consumption
  • CWE-405: CWE-405: Asymmetric Resource Consumption (Amplification)
  • CWE-409: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
  • CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling
  • CWE-789: CWE-789: Memory Allocation with Excessive Size Value
  • CWE-1287: CWE-1287: Improper Validation of Specified Type of Input

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

References