CVE-2008-2664

The rb_str_format function in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, 1.8.7 before 1.8.7-p22, and 1.9.0 before 1.9.0-2 allows context-dependent attackers to trigger memory corruption via unspecified vectors related to alloca, a different issue than CVE-2008-2662, CVE-2008-2663, and CVE-2008-2725. NOTE: as of 20080624, there has been inconsistent usage of multiple CVE identifiers related to Ruby. The CVE description should be regarded as authoritative, although it is likely to change.

Published: 2008-06-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2008-2664 is rated Moderate Risk (61.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.28%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2008-2664

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 5.12% 4.28% -0.84%
2 2026-06-03 11.36% 5.12% -6.25%
3 2026-06-01 — 11.36% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2008-2664

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2008-2664

OS Trackers for CVE-2008-2664

vendor priority summary link
gentoo normal CVE-2008-2664: 1 GLSA(s) (200812-17), 1 atom(s) (dev-lang/ruby); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2008-2664
redhat low — https://access.redhat.com/security/cve/CVE-2008-2664
ubuntu medium CVE-2008-2664 medium priority: Ubuntu including 2 source packages (ruby1.8, ruby1.9), 24 status rows across 12 suites (dapper, feisty, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): released 10, not-affected 7, ignored 4, DNE 3. https://ubuntu.com/security/CVE-2008-2664

Affected software / configurations for CVE-2008-2664

Vendor Product Version Raw CPE
ruby-lang ruby <= 1.8.4 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby > 1.8.5, < 1.8.5.231 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby >= 1.8.6, < 1.8.6.230 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby >= 1.8.7, < 1.8.7.22 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby >= 1.9.0, < 1.9.0.2 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
debian debian_linux 4.0 cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:*
canonical ubuntu_linux 6.06 cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:lts:*:*:*
canonical ubuntu_linux 7.04 cpe:2.3:o:canonical:ubuntu_linux:7.04:*:*:*:*:*:*:*
canonical ubuntu_linux 7.10 cpe:2.3:o:canonical:ubuntu_linux:7.10:*:*:*:*:*:*:*
canonical ubuntu_linux 8.04 cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:*

References for CVE-2008-2664

URL Tags
http://blog.phusion.nl/2008/06/23/ruby-186-p230187-broke-your-app-ruby-enterprise-edition-to-the-rescue/ Third Party Advisory
http://lists.apple.com/archives/security-announce/2008//Jun/msg00002.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2008-08/msg00006.html Third Party Advisory
http://secunia.com/advisories/30802 Third Party Advisory
http://secunia.com/advisories/30831 Third Party Advisory
http://secunia.com/advisories/30867 Third Party Advisory
http://secunia.com/advisories/30875 Third Party Advisory
http://secunia.com/advisories/30894 Third Party Advisory
http://secunia.com/advisories/31062 Third Party Advisory
http://secunia.com/advisories/31090 Third Party Advisory
http://secunia.com/advisories/31181 Third Party Advisory
http://secunia.com/advisories/31256 Third Party Advisory
http://secunia.com/advisories/31687 Third Party Advisory
http://secunia.com/advisories/33178 Third Party Advisory
http://security.gentoo.org/glsa/glsa-200812-17.xml Third Party Advisory
http://slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.429562 Mailing List Third Party Advisory
http://support.apple.com/kb/HT2163 Third Party Advisory
http://weblog.rubyonrails.org/2008/6/21/multiple-ruby-security-vulnerabilities Third Party Advisory
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0206 Broken Link
http://www.debian.org/security/2008/dsa-1612 Third Party Advisory
http://www.debian.org/security/2008/dsa-1618 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:140 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:141 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:142 Third Party Advisory
http://www.matasano.com/log/1070/updates-on-drew-yaos-terrible-ruby-vulnerabilities/ Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2008-0561.html Third Party Advisory
http://www.ruby-forum.com/topic/157034 Third Party Advisory
http://www.ruby-lang.org/en/news/2008/06/20/arbitrary-code-execution-vulnerabilities/ Patch Vendor Advisory
http://www.rubyinside.com/june-2008-ruby-security-vulnerabilities-927.html Third Party Advisory
http://www.securityfocus.com/archive/1/493688/100/0/threaded Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/29903 Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1020347 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/usn-621-1 Third Party Advisory
http://www.vupen.com/english/advisories/2008/1907/references Third Party Advisory
http://www.vupen.com/english/advisories/2008/1981/references Third Party Advisory
http://www.zedshaw.com/rants/the_big_ruby_vulnerabilities.html Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/43348 Third Party Advisory VDB Entry
https://issues.rpath.com/browse/RPL-2626 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9646 Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00937.html Third Party Advisory
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