Ubuntu Server snap-confine must_mkdir_and_open_with_perms() Race Condition Vulnerability

Qualys discovered a race condition CVE-2022-3328 in snap-confine, a SUID-root program installed by default on Ubuntu. In this advisory,they tell the story of this vulnerability which was introduced in February 2022 by the patch for CVE-2021-44731 and detail how they exploited it in Ubuntu Server ...

snap-confine must_mkdir_and_open_with_perms() Race Condition

Qualys Security Advisory Race condition in snap-confine's mustmkdirandopenwithperms CVE-2022-3328 ======================================================================== Contents ======================================================================== Summary Background Exploitation...

Critical Ping Vulnerability Allows Remote Attackers to Take Over FreeBSD Systems

The maintainers of the FreeBSD operating system have released updates to remediate a security vulnerability impacting the ping module that could be potentially exploited to crash the program or trigger remote code execution. The issue, assigned the identifier CVE-2022-23093, impacts all supported...

Race Condition

snapd is vulnerable to race condition. An attacker is able to trigger a race condition in snap-confine's mustmkdirandopenwithperms function...

The vulnerability of the must_mkdir_and_open_with_perms() function in the snap-confine utility of the Ubuntu operating system allows a perpetrator to…

The vulnerability of the mustmkdirandopenwithperms function in the snap-confine utility of the Ubuntu operating system is related to synchronization errors when using a shared resource “Race Condition”. Exploiting this vulnerability can allow an attacker to increase their privileges or execute...

Debian: Security Advisory (DSA-5292-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2022 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Snapd Race Condition Vulnerability in snap-confine’s must_mkdir_and_open_with_perms() (CVE-2022-3328)

The Qualys Threat Research Unit TRU has discovered a new vulnerability in snap-confine function on Linux operating systems, a SUID-root program installed by default on Ubuntu. Qualys recommends that security teams apply the patch for this vulnerability as soon as possible. In February 2022, Qualy...

CVE-2022-3328

Race condition in snap-confine's mustmkdirandopenwithperms...

USN-5292-4: snapd regression

USN-5292-1 fixed a vulnerability in snapd. Unfortunately that update introduced a regression that could break the fish shell. This update fixes the problem. We apologize for the inconvenience. Original advisory details: James Troup discovered that snap did not properly manage the permissions for...

Arbitrary Code Execution

Overview Affected versions of this package are vulnerable to Arbitrary Code Execution due to improper validation of the snap-confine binary location. A local attacker could possibly use this issue to execute other arbitrary binaries and escalate privileges. Remediation Upgrade...

New Linux Privilege Escalation Flaw Uncovered in Snap Package Manager

Multiple security vulnerabilities have been disclosed in Canonical's Snap software packaging and deployment system, the most critical of which can be exploited to escalate privilege to gain root privileges. Snaps are self-contained application packages that are designed to work on operating syste...

USN-5292-3 snapd vulnerabilities

USN-5292-1 fixed several vulnerabilities in snapd. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: James Troup discovered that snap did not properly manage the permissions for the snap directories. A local attacker could possibly...

Ubuntu 16.04 ESM : snapd vulnerabilities (USN-5292-3)

The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5292-3 advisory. USN-5292-1 fixed several vulnerabilities in snapd. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Tenable has...

CVE-2021-4120

snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions...

CVE-2021-44730

snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and...

CVE-2021-44731

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitra...

CVE-2021-44731

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitra...

DEBIAN-CVE-2021-44730

snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and...

DEBIAN-CVE-2021-44731

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitra...

Oh Snap! More Lemmings: Local Privilege Escalation Vulnerability Discovered in snap-confine (CVE-2021-44731)

The Qualys Research Team has discovered multiple vulnerabilities in the snap-confine function on Linux operating systems, the most important of which can be exploited to escalate privilege to gain root privileges. Qualys recommends security teams apply patches for these vulnerabilities as soon as...