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Directory Traversal in xtalk

High severity GitHub Reviewed Published Sep 1, 2020 to the GitHub Advisory Database • Updated Sep 11, 2023

Package

npm xtalk (npm)

Affected versions

>= 0.0.2

Patched versions

None

Description

Affected versions of xtalk are vulnerable to directory traversal, allowing access to the filesystem by placing "../" in the URL.

Example request:

GET /../../../../../../../../../../etc/passwd HTTP/1.1
host:localhost

Recommendation

No patch is currently available for this vulnerability, and the package has not been updated since 2014.

The best mitigation is currently to avoid using this package, and using a different, functionally equivalent package.

References

Reviewed Aug 31, 2020
Published to the GitHub Advisory Database Sep 1, 2020
Last updated Sep 11, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.637%
(80th percentile)

Weaknesses

CVE ID

CVE-2017-16091

GHSA ID

GHSA-cqv6-7fwc-8m3c

Source code

No known source code
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