CVE-2020-5404
Authentication Leak On Redirect With Reactor Netty HttpClient
No known exploitation. EPSS puts it in the 52nd percentile. Fixed versions are out.
No public exploit knownFix3 products3 fixed builds listed below
No ready-made check. Neither Nuclei nor OpenVAS has one for this CVE yet.
What to do
Find your product and version, then upgrade to the build on the right.
- Pivotal Reactor NettyAffected: ≥ 0.8, < v0.8.16.RELEASEUpgrade to: v0.8.16.RELEASEAffected: ≥ 0.9, < v0.9.5.RELEASEUpgrade to: v0.9.5.RELEASEStated by: CVE record
- Maven io.projectreactor.netty:reactor-netty-httpAffected: ≥ 0.9.0, < 0.9.5Upgrade to: 0.9.5Stated by: GitHub advisory
- Broadcom Reactor NettyAffected: ≥ 0.8.0, ≤ 0.8.15Upgrade to: after 0.8.15Stated by: NVD
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
The HttpClient from Reactor Netty, versions 0.9.x prior to 0.9.5, and versions 0.8.x prior to 0.8.16, may be used incorrectly, leading to a credentials leak during a redirect to a different domain. In order for this to happen, the HttpClient must have been explicitly configured to follow redirects.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.7% chance of exploitation activity in the next 30 days, which ranks it in the 52nd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
7 events over 2376 days, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Scored 5.9 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity LowData modification is possible but limited in scope or consequence
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
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