CVE-2020-8831
Ubuntu Apport Symlink Privilege Escalation Vulnerability
Description
Apport creates a world writable lock file with root ownership in the world writable /var/lock/apport directory. If the apport/ directory does not exist (this is not uncommon as /var/lock is a tmpfs), it will create the directory, otherwise it will simply continue execution using the existing directory. This allows for a symlink attack if an attacker were to create a symlink at /var/lock/apport, changing apport's lock file location. This file could then be used to escalate privileges, for example. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.
INFO
Published Date :
April 22, 2020, 10:15 p.m.
Last Modified :
Oct. 7, 2022, 3:38 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
4.0
Exploitability Score :
2.0
Affected Products
The following products are affected by CVE-2020-8831
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-8831.
| URL | Resource |
|---|---|
| https://launchpad.net/bugs/1862348 | Exploit Third Party Advisory |
| https://usn.ubuntu.com/4315-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4315-2/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-8831 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-8831 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Oct. 07, 2022
Action Type Old Value New Value Changed Reference Type https://usn.ubuntu.com/4315-2/ No Types Assigned https://usn.ubuntu.com/4315-2/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* OR *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 24, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4315-2/ [No Types Assigned] -
CPE Deprecation Remap by [email protected]
May. 04, 2020
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* OR *cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Apr. 30, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://launchpad.net/bugs/1862348 No Types Assigned https://launchpad.net/bugs/1862348 Exploit, Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4315-1/ No Types Assigned https://usn.ubuntu.com/4315-1/ Third Party Advisory Added CWE NIST CWE-59 Added CPE Configuration OR *cpe:2.3:a:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Added CPE Configuration OR *cpe:2.3:a:apport_project:apport:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-8831 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-8831
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.00%
score
0.33513
percentile