CVE-2020-8244
Published:August 30, 2020
Updated:April 09, 2026
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.
Affected Packages
bl (NPM):
Affected version(s) >=2.0.0 <2.2.1Fix Suggestion:
Update to version 2.2.1bl (NPM):
Affected version(s) =3.0.0 <3.0.1Fix Suggestion:
Update to version 3.0.1bl (NPM):
Affected version(s) >=4.0.0 <4.0.3Fix Suggestion:
Update to version 4.0.3bl (NPM):
Affected version(s) >=0.0.0 <1.2.3Fix Suggestion:
Update to version 1.2.3Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
LOW
CVSS v2
Base Score:
6.4
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
EPSS
Base Score:
1.03
