LibSass 3.5.4 ast.hpp perform resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

A vulnerability was found in LibSass 3.5.4 (Programming Language Software). It has been rated as problematic. Affected by this issue is the function Sass::Complex_Selector::perform of the file ast.hpp. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

LibSass 3.5.4 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp).

The weakness was disclosed 04/23/2019 (Website). The advisory is available at lists.opensuse.org. This vulnerability is handled as CVE-2018-20822 since 04/23/2019. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entry 133981 is pretty similar.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/23/2019 🔍
04/23/2019 +0 days 🔍
04/23/2019 +0 days 🔍
09/06/2023 +1597 days 🔍

Sourcesinfo

Advisory: 2671
Status: Not defined

CVE: CVE-2018-20822 (🔍)
See also: 🔍

Entryinfo

Created: 04/23/2019 19:32
Updated: 09/06/2023 15:45
Changes: 04/23/2019 19:32 (55), 06/01/2020 15:27 (1), 09/06/2023 15:45 (3)
Complete: 🔍

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