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CVE-2008-3443

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8...

5.0 MediumPublic exploitFix available

CVE-2008-3443 is a medium vulnerability (CVSS 5.0) in Ruby-lang Ruby, published August 14, 2008. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 15.7%, the 96th percentile. Fixed in ruby1.9 1.9.0+20060609-1etch4.

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.

Exploit likelihood

15.7%Up 3.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.

Record
CVE-2008-3443
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.

Record
CVE-2008-3443
Updated
2026-11-02
EUVDEUVD-2008-3429 No score

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.

Record
EUVD-2008-3429
Updated
2026-11-03
GitHub AdvisoriesGHSA-v838-v88j-gw93 No score

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8...

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.

Record
GHSA-v838-v88j-gw93
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ruby1.9
Debian:4.0
 before 1.9.0+20060609-1etch4, plus listed versions
1.9.0+20060609-11.9.0+20060609-1etch11.9.0+20060609-1etch21.9.0+20060609-1etch3
1.9.0+20060609-1etch4
ruby1.8
Debian:4.0
 before 1.8.5-4etch4, plus listed versions
1.8.5-41.8.5-4etch11.8.5-4etch21.8.5-4etch3
1.8.5-4etch4
irb
Red Hat:enterprise_linux:2.1::as
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby
Red Hat:enterprise_linux:2.1::as
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-devel
Red Hat:enterprise_linux:2.1::as
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-docs
Red Hat:enterprise_linux:2.1::as
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-libs
Red Hat:enterprise_linux:2.1::as
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-tcltk
Red Hat:enterprise_linux:2.1::as
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
irb
Red Hat:enterprise_linux:2.1::es
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby
Red Hat:enterprise_linux:2.1::es
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
Show 96 moreShow less
Affected packages
PackageAffectedFixed
ruby-devel
Red Hat:enterprise_linux:2.1::es
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-docs
Red Hat:enterprise_linux:2.1::es
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-libs
Red Hat:enterprise_linux:2.1::es
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-tcltk
Red Hat:enterprise_linux:2.1::es
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
irb
Red Hat:enterprise_linux:2.1::ws
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby
Red Hat:enterprise_linux:2.1::ws
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-devel
Red Hat:enterprise_linux:2.1::ws
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-docs
Red Hat:enterprise_linux:2.1::ws
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-libs
Red Hat:enterprise_linux:2.1::ws
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
ruby-tcltk
Red Hat:enterprise_linux:2.1::ws
 before 0:1.6.4-7.el2
0:1.6.4-7.el2
irb
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-devel
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-docs
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-libs
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-mode
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-tcltk
Red Hat:enterprise_linux:3::as
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
irb
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-devel
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-docs
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-libs
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-mode
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-tcltk
Red Hat:enterprise_linux:3::desktop
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
irb
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-devel
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-docs
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-libs
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-mode
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-tcltk
Red Hat:enterprise_linux:3::es
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
irb
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-devel
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-docs
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-libs
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-mode
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
ruby-tcltk
Red Hat:enterprise_linux:3::ws
 before 0:1.6.8-13.el3
0:1.6.8-13.el3
irb
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-devel
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-docs
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-libs
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-mode
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-tcltk
Red Hat:enterprise_linux:4::as
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
irb
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-devel
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-docs
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-libs
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-mode
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-tcltk
Red Hat:enterprise_linux:4::desktop
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
irb
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-devel
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-docs
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-libs
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-mode
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-tcltk
Red Hat:enterprise_linux:4::es
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
irb
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-devel
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-docs
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-libs
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-mode
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby-tcltk
Red Hat:enterprise_linux:4::ws
 before 0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
ruby
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-debuginfo
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-devel
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-mode
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-docs
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-irb
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-libs
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-rdoc
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-ri
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-tcltk
Red Hat:enterprise_linux:5::client
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-devel
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-docs
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-irb
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-libs
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-mode
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-rdoc
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-ri
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
ruby-tcltk
Red Hat:enterprise_linux:5::server
 before 0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBRuby 1.9 - regex engine Remote Socket Memory Leak2008-08-13

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

References

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