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. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.

• CWE-326

• http://www.openwall.com/lists/oss-security/2013/07/01/1Mailing List, Third Party Advisory
• https://access.redhat.com/security/cve/cve-2011-4121Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4121Issue Tracking, Third Party Advisory
• https://security-tracker.debian.org/tracker/CVE-2011-4121Third Party Advisory
• http://www.openwall.com/lists/oss-security/2013/07/01/1Mailing List, Third Party Advisory
• https://access.redhat.com/security/cve/cve-2011-4121Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4121Issue Tracking, Third Party Advisory
• https://security-tracker.debian.org/tracker/CVE-2011-4121Third Party Advisory

Published

Nov 26, 2019

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2011-4115Parallel::ForkManager module before 1.0.0 for Perl does not …7.5
• CVE-2011-4116_is_safe in the File::Temp module for Perl does not properly…3.3
• CVE-2011-4117The Batch::BatchRun module 1.03 for Perl does not properly h…7.5
• CVE-2011-4118Mahara before 1.4.1, when MNet (aka the Moodle network featu…
• CVE-2011-4119caml-light <= 0.75 uses mktemp() insecurely, and also does u…9.8
• CVE-2011-4120Yubico PAM Module before 2.10 performed user authentication …9.8
• CVE-2011-4122Directory traversal vulnerability in openpam_configure.c in …
• CVE-2011-4123Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultI…
• CVE-2011-4124Input validation issues were found in Calibre at devices/lin…9.8
• CVE-2011-4125A untrusted search path issue was found in Calibre at device…9.8
• CVE-2011-4126Race condition issues were found in Calibre at devices/linux…8.1
• CVE-2011-4127The Linux kernel before 3.2.2 does not properly restrict SG_…