Debian LinuxOperating system · Debian
CVE-2019-8322
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn issue was discovered in RubyGems 2.6 and later through 3.0.2. The gem owner command outputs the contents of the API response directly to stdout. Therefore, if the response is crafted, escape sequence injection may occur.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceRubyGems versions 2.6 through 3.0.2 contain an escape sequence injection vulnerability in the gem owner command. The command outputs API response contents directly to stdout without sanitization, allowing an attacker who controls the API response (e.g., via compromised gem repository or MITM attack) to inject ANSI escape sequences or terminal control characters.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Debian LinuxOperating system
= 9.0>= 2.6.0, <= 3.0.2= 15.0= 15.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check installed RubyGems versionRun `gem --version` or `gem --version` to get the version numberAffected if Version is greater than or equal to 2.6.0 and less than or equal to 3.0.2
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Check gem sources configurationRun `gem source --list` to list configured gem sourcesAffected if Sources include HTTP (non-HTTPS) URLs or point to untrusted or compromised repositories
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Inspect recent gem owner command usageReview shell history or logs for use of `gem owner` command, or run `gem owner --help` to confirm the command existsAffected if The gem owner command is available and the system pulls gems from remote sources
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Verify gem command output handlingObserve output from any `gem` command that displays remote API responses, particularly `gem owner`Affected if Output displays raw content from gem repository API responses without visible sanitization
A system is affected if RubyGems version 2.6.0 through 3.0.2 is installed AND gem sources include remote repositories (especially over HTTP or untrusted sources) where an attacker could inject malicious ANSI escape sequences via API responses.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade RubyGems to version 3.0.3 or later. Additionally, verify gem sources and use HTTPS to prevent MITM attacks that could inject malicious responses.
Fix this in Debian Linux
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-8322 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-8322 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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