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Vigil@nce - libbfd: use after free via bfd_hash_lookup

March 2021 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability

SYNTHESIS OF THE VULNERABILITY

Impacted products: Fedora.

Severity: 2/4.

Consequences: user access/rights, denial of service on service,
denial of service on client.

Provenance: document.

Confidence: confirmed by the editor (5/5).

Creation date: 28/12/2020.

DESCRIPTION OF THE VULNERABILITY

An attacker can force the usage of a freed memory area via
bfd_hash_lookup() of libbfd, in order to trigger a denial of
service, and possibly to run code.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/libbfd-use-after-free-via-bfd-hash-lookup-34204


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