Critical severity · published Nov 26, 2019
CVE-2011-4121
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
9.8
CVSS
2.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.5% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RU
Ruby · Ruby-lang
1.8.7.334 before 1.9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-4121
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-4121
Mailing List
http://www.openwall.com/lists/oss-security/2013/07/01/1
Third Party Advisory
https://access.redhat.com/security/cve/cve-2011-4121
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4121
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-4121
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