2021-27293 | RestSharp incorrect regex

CVSS Meta Temp Score

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Current Exploit Price (≈)

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CTI Interest Score

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4.1 $0-$5k 0.38

A vulnerability was found in RestSharp. It has been rated as critical. Affected by this issue is an unknown function. The manipulation of the argument DateTimes with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-185. Impacted is availability. CVE summarizes:

RestSharp < 106.11.8-alpha.0.13 uses a regular expression which is vulnerable to Regular Expression Denial of Service (ReDoS) when converting strings into DateTimes. If a server responds with a malicious string, the client using RestSharp will be stuck processing it for an exceedingly long time. Thus the remote server can trigger Denial of Service.

The weakness was disclosed 07/12/2021. The advisory is available at github.com. This vulnerability is handled as CVE-2021-27293 since 02/16/2021. The attack may be launched remotely. The successful exploitation requires a simple authentication. Technical details are known, but there is no available exploit.

Upgrading to version 106.11.8-alpha.0.13 eliminates this vulnerability.


VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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Vector Complexity Authentication Confidentiality Integrity Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Privilege escalation
CWE: CWE-185
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: RestSharp 106.11.8-alpha.0.13

02/16/2021 CVE assigned
07/12/2021 +145 days Advisory disclosed
07/12/2021 +0 days VulDB entry created
07/15/2021 +3 days VulDB last updateAdvisory: github.com
Status: Confirmed

CVE: CVE-2021-27293 (🔒)

Created: 07/12/2021 14:56
Updated: 07/15/2021 10:11
Changes: (5) source_cve_assigned source_cve_nvd_summary vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
Complete: 🔍


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