Nebulous Puffy Marshmallows
Severity: high

Remote Memory Exposure

bl

Overview

A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1 <2.2.1 and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.

Remediation

Upgrade to version 4.0.3, 3.0.1, 2.2.1 or 1.2.3.

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Advisory timeline

  1. published

    Advisory Published
    Sep 8th, 2020
  2. reported

    Reported by chalker
    Sep 8th, 2020