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Vigil@nce - HAProxy: out-of-bounds memory reading via dns_validate_dns_response

March 2019 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer...

SYNTHESIS OF THE VULNERABILITY

Impacted products: Fedora, openSUSE Leap, SLES, Ubuntu.

Severity: 2/4.

Consequences: data reading, denial of service on service, denial of service on client.

Provenance: intranet client.

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

Creation date: 11/01/2019.

DESCRIPTION OF THE VULNERABILITY

An attacker can force a read at an invalid address via dns_validate_dns_response() of HAProxy, in order to trigger a denial of service, or to obtain sensitive information.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/...




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