canonical ubuntu-linux CVE-2021-44730 vulnerability in Canonical and Other Products
Published on February 17, 2022

snapd could be made to escalate privileges and run programs as administrator

product logo product logo product logo
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 2.54.3+21.10.1

Vendor Advisory Vendor Advisory Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-44730 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is an insecure temporary file Vulnerability?

The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

CVE-2021-44730 has been classified to as an insecure temporary file vulnerability or weakness.


Products Associated with CVE-2021-44730

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-44730 are published in these products:

Canonical Ubuntu Linux
 
Canonical Snapd
 
Fedora Project Fedora
 
Debian Linux
 

Affected Versions

Canonical Ltd. snapd:

Exploit Probability

EPSS
0.04%
Percentile
11.64%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.