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GHSA-pp7h-53gx-mx7r

Remote Memory Exposure in bl

Source: GitHub Advisory Database (reviewed) Moderate CVE-2020-8244

Packages

EcosystemPackageAffectedFixed in
npm bl < 1.2.3 1.2.3
npm bl >= 2.0.0, < 2.2.1 2.2.1
npm bl >= 3.0.0, < 3.0.1 3.0.1
npm bl >= 4.0.0, < 4.0.3 4.0.3

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.