CVE-2011-2705: ruby-lang ruby Improper Input Validation

Modified

Published 05-08-2011Last modified 06-08-2024

Vulnerability summary

CVE-2011-2705 is a medium (CVSS 5.0) Improper Input Validation vulnerability in ruby-lang ruby. EPSS estimates a 2.25% chance of exploitation in the next 30 days, higher than 82.9% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.0/10

010

Medium · v2.0 (NVD)

EPSS score

2.25%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6

DLA-235-1 DLA-88-1 RHSA-2011:1581 RHSA-2026:7305 RHSA-2026:7307 RHSA-2026:8838

Timeline

05-08-2011
PublishedVulnerability first disclosed.
06-08-2024
Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

1 score · 1 source · 1 version

v2.05.0

EPSS trend

Probability

2.25%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.25% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Ruby-lang1 product

ruby≤ 1.8.7-334 | 1.8.7:p22 | 1.8.7:p71 | 1.8.7:p72 | 1.8.7-160 | 1.8.7-173 | 1.8.7-248 | 1.8.7-249 | 1.8.7-299 | 1.8.7-302 | 1.8.7-330 | 1.8.7-p21 | 1.9 | 1.9:r18423 | 1.9.0 | 1.9.0:r18423 | 1.9.0-0 | 1.9.0-1 | 1.9.0-2 | 1.9.0-20060415 | 1.9.0-20070709 | 1.9.1 | 1.9.1:-p0 | 1.9.1:-p129 | 1.9.1:-p243 | 1.9.1:-p376 | 1.9.1:-p429 | 1.9.1:-preview_1 | 1.9.1:-preview_2 | 1.9.1:-rc1 | 1.9.1:-rc2 | 1.9.2 | 1.9.2:dev | 1.9.2-p136 | 1.9.2-p180

1 vendor · 1 product

References

15 links

www.openwall.com/lists/oss-security/2011/07/12/14Mailing ListX Refsource MLISTPatch
www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/X Refsource CONFIRMPatch
bugzilla.redhat.com/show_bug.cgi?id=722415X Refsource CONFIRMPatch
www.openwall.com/lists/oss-security/2011/07/20/16Mailing ListX Refsource MLISTPatch
www.redhat.com/support/errata/RHSA-2011-1581.htmlVendor AdvisoryX Refsource REDHAT
www.ruby-lang.org/en/news/2011/07/15/ruby-1-9-2-p290-is-released/X Refsource CONFIRMPatch
svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=32050X Refsource CONFIRMPatch
svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLogX Refsource CONFIRM
lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.htmlVendor AdvisoryX Refsource FEDORAPatch
svn.ruby-lang.org/repos/ruby/tags/v1_9_2_290/ChangeLogX Refsource CONFIRM

Show all 15 references

www.openwall.com/lists/oss-security/2011/07/20/1Mailing ListX Refsource MLISTPatch
redmine.ruby-lang.org/issues/4579X Refsource CONFIRM
www.openwall.com/lists/oss-security/2011/07/11/1Mailing ListX Refsource MLISTPatch
www.securityfocus.com/bid/49015VDB EntryX Refsource BID
lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.htmlVendor AdvisoryX Refsource FEDORA