Mechanize before v2.8.5 vulnerable to authorization header leak on port redirect

CVE-2022-31033 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Summary

Mechanize (rubygem) < v2.8.5 leaks the Authorization header after a redirect to a different port on the same site.

Mitigation

Upgrade to Mechanize v2.8.5 or later.

Notes

See https://curl.se/docs/CVE-2022-27776.html for a similar vulnerability in curl.

Cookies are shared with a server at a different port on the same site, per https://datatracker.ietf.org/doc/html/rfc6265#section-8.5 which states in part:

> Cookies do not provide isolation by port. If a cookie is readable
> by a service running on one port, the cookie is also readable by a
> service running on another port of the same server. If a cookie is
> writable by a service on one port, the cookie is also writable by a
> service running on another port of the same server. For this
> reason, servers SHOULD NOT both run mutually distrusting services on
> different ports of the same host and use cookies to store security-
> sensitive information.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2022-06-09 23:47:57 UTC
Updated
2023-01-27 05:04:04 UTC
GitHub reviewed
2022-06-09 23:47:57 UTC
NVD published
2022-06-09

EPSS Score

Score Percentile
0.33% 55.53%

CVSS Scores

Base score Version Severity Vector
5.9 3.1 —
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

Type Value
GHSA GHSA-64qm-hrgp-pgr9 ↗
CVE CVE-2022-31033 ↗

CWEs

CWE id Name
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-522 Insufficiently Protected Credentials

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
rubygems mechanize < 2.8.5 2.8.5 —

References

cvelogic Threat Intelligence