Vigil@nce - Sudo: buffer overflow via Command Unescaping Backslashes
March 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
– Impacted products: Mac OS X, Nexus by Cisco, NX-OS, Debian,
Fedora, McAfee Web Gateway, openSUSE Leap, Solaris, RHEL,
Slackware, Sudo, SUSE Linux Enterprise Desktop, SLES, Synology
DSM, Synology DS***, Synology RS***, Ubuntu, AdminBastion.
– Severity: 2/4.
– Consequences: administrator access/rights, privileged
access/rights, user access/rights.
– Provenance: user shell.
– Confidence: confirmed by the editor (5/5).
– Creation date: 27/01/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker can trigger a buffer overflow via Command Unescaping
Backslashes of Sudo, in order to trigger a denial of service, and
possibly to run code.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Sudo-buffer-overflow-via-Command-Unescaping-Backslashes-34414