VDB-217451 · CVE-2017-20162 · ID 89

vercel ms up to 1.x index.js parse str redos

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5	$0-$5k	0.08

A vulnerability, which was classified as problematic, has been found in vercel ms up to 1.x. This issue affects the function parse of the file index.js. The manipulation of the argument str with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability.

The weakness was released 01/05/2023 as 89. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2017-20162. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1449.003 according to MITRE ATT&CK.

The exploit is available at github.com. It is declared as proof-of-concept.

Upgrading to version 2.0.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch caae2988ba2a37765d055c4eee63d383320ee662 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. The advisory contains the following remark:

Limit str to 100 to avoid ReDoS of 0.3s (#89)

Productinfo

Vendor

vercel

Name

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 4.3
CNA Vector (VulDB): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ms 2.0.0
Patch: caae2988ba2a37765d055c4eee63d383320ee662

Timelineinfo

01/05/2023 🔍
01/05/2023 +0 days 🔍
01/05/2023 +0 days 🔍
01/28/2023 +23 days 🔍

Sourcesinfo

Advisory: 89
Status: Confirmed

CVE: CVE-2017-20162 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/05/2023 12:54 PM
Updated: 01/28/2023 04:13 PM
Changes: 01/05/2023 12:54 PM (49), 01/28/2023 04:05 PM (2), 01/28/2023 04:13 PM (28)
Complete: 🔍
Cache ID: 18:F0F:40