CVE-2013-4389

Rails vulnerability

CVSS

4.3

EPSS

3.1%

EPSS pct

87th

Exploited

No known

Multiple format string vulnerabilities in log_subscriber.rb files in the log subscriber component in Action Mailer in Ruby on Rails 3.x before 3.2.15 allow remote attackers to cause a denial of service via a crafted e-mail address that is improperly handled during construction of a log message.

Affected vendor

Rubyonrails

Affected product

Rails

CVSS vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Weakness type (CWE)

CWE-134 — Uncontrolled Format String

Published

2013-10-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2013-4389

Confirm whether Rubyonrails Rails is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2013-4389.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-4389

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-4389 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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