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CVE-2011-4121

CRITICAL
9.8
CVSS Score
Published: November 26, 2019 at 04:35 AM UTC
Updated: June 16, 2026 at 11:34 PM UTC
2 products affected across 2 vendorsRubyLang Ruby

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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%

Description

The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ruby· Ruby Langrubygems
95%
1.8.7.334 ≤ v < 1.9.3
Affected range stops below 1.9.3, so it looks safe — our inference, not a vendor statement
Lang Ruby· OpenSSL
60%
v ≤ 2011-11-3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2013/07/01/1
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/cve-2011-4121
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4121
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://security-tracker.debian.org/tracker/CVE-2011-4121

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-326

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