CVE-2018-20821
LibSass Denial-of-Service Vulnerability
Description
The parsing component in LibSass through 3.5.5 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Parser::parse_css_variable_value in parser.cpp).
INFO
Published Date :
April 23, 2019, 2:29 p.m.
Last Modified :
Feb. 28, 2023, 8:46 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2018-20821 has a 5 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2018-20821.
| URL | Resource |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html | Broken Link |
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html | Broken Link |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html | Broken Link |
| https://github.com/sass/libsass/issues/2658 | Exploit Patch 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).
[ICSE2020] MemLock DataSet
fuzzing
Makefile M4 C Objective-C DIGITAL Command Language sed Shell C++ Perl Lex
None
Makefile Python Shell CMake JavaScript HTML CSS C++ C Java
[ICSE2020] MemLock DataSet
fuzzing
Makefile Python Shell CMake JavaScript HTML CSS C++ C Java
MemLock_Benchmark: The vulnerability related to Excessive Memory Consumption, which can test the ability of fuzzer for generating inputs that consume lost of memory.
Makefile Python Shell CMake JavaScript HTML CSS C++ C Java
ExMem_Benchmark: The vulnerability related to Excessive Memory Consumption, which can test the ability of fuzzer for generating inputs that consume lost of memory.
Makefile Python Shell CMake JavaScript HTML CSS C++ C Java
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-20821 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-20821 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]
Feb. 28, 2023
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html Broken Link Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html Broken Link Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html Broken Link -
CWE Remap by [email protected]
Aug. 24, 2020
Action Type Old Value New Value Changed CWE CWE-400 CWE-674 -
CVE Modified by [email protected]
Aug. 14, 2019
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html [No Types Assigned] -
CVE Modified by [email protected]
Jul. 24, 2019
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html [No Types Assigned] -
CVE Modified by [email protected]
Jul. 23, 2019
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 24, 2019
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/sass/libsass/issues/2658 No Types Assigned https://github.com/sass/libsass/issues/2658 Exploit, Patch, Third Party Advisory Added CWE CWE-400 Added CPE Configuration OR *cpe:2.3:a:sass-lang:libsass:*:*:*:*:*:*:*:* versions up to (including) 3.5.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-20821 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-2018-20821
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.28 }} 0.04%
score
0.68100
percentile