CVE-2011-2705

Home/CVE/The SecureRandom.random_bytes function in lib/securerandom.rb in Ruby before 1.8.7-p352 and 1.9.x before 1.9.2-p290 reli

CVE

The SecureRandom.random_bytes function in lib/securerandom.rb in Ruby before 1.8.7-p352 and 1.9.x before 1.9.2-p290 reli

The SecureRandom.random_bytes function in lib/securerandom.rb in Ruby before 1.8.7-p352 and 1.9.x before 1.9.2-p290 relies on PID values for initialization, which makes it easier for context-dependent attackers to predict the result string by leveraging knowledge of random strings obtained in an earlier process with the same PID.

MEDIUM · CVSS 5 EPSS 0.00989

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules3 YARA rules0

⬡

Weakness Classification

CWE-20Improper Input Validation

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Affected Products & Versions

ruby-lang ruby<= 1.8.7-334

ruby-lang rubyall versions

◈

Sigma Hunt Rules

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

productmediumRuby on Rails Framework Exceptions

productmediumPotential Ruby Reverse Shell

productmediumRuby Inline Command Execution

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Scoring & Timeline

MEDIUM · CVSS v2 (legacy) · secalert@redhat.com

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

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

Published to NVD05 Aug 2011 · 09:55 PM

⚑

Vendor Advisories

rhsaRHSA-2026:7307Moderate
rhsaRHSA-2026:8838Moderate
rhsaRHSA-2026:7305Moderate
usnUSN-1377-1
rhsaRHSA-2011:1581Low

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.htmlPatch

http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html

http://redmine.ruby-lang.org/issues/4579

http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=32050Patch

http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog

http://svn.ruby-lang.org/repos/ruby/tags/v1_9_2_290/ChangeLog

Show all 15 references

http://www.openwall.com/lists/oss-security/2011/07/11/1Patch

http://www.openwall.com/lists/oss-security/2011/07/12/14Patch

http://www.openwall.com/lists/oss-security/2011/07/20/1Patch

http://www.openwall.com/lists/oss-security/2011/07/20/16Patch

http://www.redhat.com/support/errata/RHSA-2011-1581.html

http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/Patch

http://www.ruby-lang.org/en/news/2011/07/15/ruby-1-9-2-p290-is-released/Patch

http://www.securityfocus.com/bid/49015

https://bugzilla.redhat.com/show_bug.cgi?id=722415Patch

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