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CVE-2016-7076

Status Candidate

Overview

sudo before version 1.8.18p1 is vulnerable to a bypass in the sudo noexec restriction if application run via sudo executed wordexp() C library function with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could possibly use this flaw to execute arbitrary commands with elevated privileges.

Related Files

Ubuntu Security Notice USN-3968-1
Posted May 6, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3968-1 - Florian Weimer discovered that Sudo incorrectly handled the noexec restriction when used with certain applications. A local attacker could possibly use this issue to bypass configured restrictions and execute arbitrary commands. It was discovered that Sudo did not properly parse the contents of /proc/[pid]/stat when attempting to determine its controlling tty. A local attacker in some configurations could possibly use this to overwrite any file on the filesystem, bypassing intended permissions. Various other issues were also addressed.

tags | advisory, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2016-7076, CVE-2017-1000368
SHA-256 | d41b10dd2219c1694797bcb7f4beef3a922178c7cf9a1af0fa4fb6292db3efb2
Red Hat Security Advisory 2016-2872-01
Posted Dec 6, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-2872-01 - The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix: It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges.

tags | advisory, arbitrary, local, root
systems | linux, redhat
advisories | CVE-2016-7032, CVE-2016-7076
SHA-256 | 8e41cabe0b6906610a2b234cb672a2d7cfec3592a3b6f1a8c617eab6e4f006fa
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