CVE-2011-2686: ruby-lang ruby Cryptographic Issues

Modified

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

Vulnerability summary

CVE-2011-2686 is a medium (CVSS 5.0) Cryptographic Issues vulnerability in ruby-lang ruby. EPSS estimates a 2.58% chance of exploitation in the next 30 days, higher than 85.2% 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

2.58%

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 4

DLA-88-1 RHSA-2026:7305 RHSA-2026:7307 RHSA-2026:8838

Timeline

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

Description

Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900. NOTE: this issue exists because of a regression during Ruby 1.8.6 development.

CVSS metrics

1 score · 1 source · 1 version

v2.05.0

EPSS trend

Probability

2.58%

Chance of exploitation in the next 30 days

Percentile

85%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.58% 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-310Cryptographic IssuesWeaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.

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 vendor · 1 product

References

13 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
redmine.ruby-lang.org/issues/show/4338X Refsource CONFIRM
svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLogX Refsource CONFIRM
svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=31713X Refsource CONFIRMPatch
lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.htmlVendor AdvisoryX Refsource FEDORAPatch
exchange.xforce.ibmcloud.com/vulnerabilities/69032VDB EntryX Refsource XF
www.openwall.com/lists/oss-security/2011/07/20/1Mailing ListX Refsource MLISTPatch

Show all 13 references

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 FEDORAPatch