UpHeron
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Servers and applications

CVE-2008-3443

The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 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.

Severity
Medium 5.0
Published
14 Aug 2008
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
16% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
RubyServers and applications · cpe:a:ruby-lang:ruby
  • Version 1.9.0-r18423
  • Version 1.9.0
  • Version 1.8.7-p71
  • Version 1.8.7-p22
All 51 release lines
  • Version 1.6.8
  • Version 1.8.0
  • Version 1.8.1
  • Version 1.8.1--9
  • Version 1.8.2-preview2
  • Version 1.8.2-preview3
  • Version 1.8.2-preview4
  • Version 1.8.2
  • Version 1.8.3-preview1
  • Version 1.8.3-preview2
  • Version 1.8.3-preview3
  • Version 1.8.3
  • Version 1.8.4-preview1
  • Version 1.8.4-preview2
  • Version 1.8.4-preview3
  • Version 1.8.4
  • Version 1.8.5-preview1
  • Version 1.8.5-preview2
  • Version 1.8.5-preview3
  • Version 1.8.5-preview4
  • Version 1.8.5-preview5
  • Version 1.8.5
  • Version 1.8.5-p2
  • Version 1.8.5-p11
  • Version 1.8.5-p12
  • Version 1.8.5-p35
  • Version 1.8.5-p52
  • Version 1.8.5-p113
  • Version 1.8.5-p114
  • Version 1.8.5-p115
  • Version 1.8.5-p231
  • Version 1.8.6-preview1
  • Version 1.8.6-preview2
  • Version 1.8.6-preview3
  • Version 1.8.6
  • Version 1.8.6-p36
  • Version 1.8.6-p110
  • Version 1.8.6-p111
  • Version 1.8.6-p114
  • Version 1.8.6-p230
  • Version 1.8.6-p286
  • Version 1.8.7-preview1
  • Version 1.8.7-preview2
  • Version 1.8.7-preview3
  • Version 1.8.7-preview4
  • Version 1.8.7
  • Version 1.8.7-p17
  • Version 1.8.7-p22
  • Version 1.8.7-p71
  • Version 1.9.0
  • Version 1.9.0-r18423

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2008-3443
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2008-3443