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Messaging GatewayApplication · Symantec

CVE-2019-18379

HIGH · 7.3 CVSS v3.1 Published 2019-12-11
Fix available
A fix is available. Upgrade to 10.7.3 or later.
See remediation →
82/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
Symantec Messaging Gateway, prior to 10.7.3, may be susceptible to a server-side request forgery (SSRF) exploit, which is a type of issue that can let an attacker send crafted requests from the backend server of a vulnerable web application or access services available through the loopback interface.

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 · moderate confidence

This is a Server-Side Request Forgery (SSRF) vulnerability in Symantec Messaging Gateway versions prior to 10.7.3. The flaw allows an attacker to craft malicious requests from the backend server, potentially accessing internal services, bypassing network restrictions, or interacting with loopback interfaces that would otherwise be inaccessible from external networks.

MitigationUpgrade Symantec Messaging Gateway to version 10.7.3 or later to remediate this vulnerability. If immediate patching is not possible, network segmentation and firewall rules restricting outbound connections from the SMG server can provide temporary risk reduction.

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
Messaging GatewayApplication
Affected:< 10.7.3

CVSS 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
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Symantec Messaging Gateway installation
    Identify whether Symantec Messaging Gateway is deployed in your environment
    Affected if The system has Symantec Messaging Gateway installed
  2. Determine installed SMG version
    Retrieve the installed version of Symantec Messaging Gateway from the system or administrative console
    Affected if Unable to determine version or version is below 10.7.3
  3. Compare version against affected range
    Verify that the installed version number is less than 10.7.3
    Affected if Installed version is prior to 10.7.3

You are affected if Symantec Messaging Gateway is installed with a version lower than 10.7.3.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Upgrade available Upgrade to 10.7.3 or later
Fixed in 10.7.3
Interim mitigation

Upgrade Symantec Messaging Gateway to version 10.7.3 or later to remediate this vulnerability. If immediate patching is not possible, network segmentation and firewall rules restricting outbound connections from the SMG server can provide temporary risk reduction.

Fix this in Messaging Gateway Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,280
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,648.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-18379 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data