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Vulnerability of nginx: buffer overflow via DNS Server Response

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via DNS Server Response of nginx, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Debian, Fedora, nginx, openSUSE Leap, RHEL, SLES, Ubuntu.
Severity of this weakness: 3/4.
Creation date: 25/05/2021.
Références of this bulletin: CERTFR-2021-AVI-399, CVE-2021-23017, DLA-2670-1, DSA-4921-1, FEDORA-2021-393d698493, FEDORA-2021-b37cffac0d, openSUSE-SU-2021:0835-1, RHSA-2021:2258-01, RHSA-2021:2259-01, RHSA-2021:2278-01, RHSA-2021:2290-01, SUSE-SU-2021:1792-1, SUSE-SU-2021:1814-1, SUSE-SU-2021:1815-1, SUSE-SU-2021:1839-1, USN-4967-1, USN-4967-2, VIGILANCE-VUL-35526, X41-2021-002.

Description of the vulnerability 

An attacker can trigger a buffer overflow via DNS Server Response of nginx, in o...
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This security alert impacts software or systems such as Debian, Fedora, nginx, openSUSE Leap, RHEL, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security weakness is important.

The trust level is of type confirmed by the editor, with an origin of internet server.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this security announce.

Solutions for this threat 

Patches for this vulnerability are not yet public.
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