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Servers and applications

CVE-2008-3905

resolv.rb in Ruby 1.8.5 and earlier, 1.8.6 before 1.8.6-p287, 1.8.7 before 1.8.7-p72, and 1.9 r18423 and earlier uses sequential transaction IDs and constant source ports for DNS requests, which makes it easier for remote attackers to spoof DNS responses, a different vulnerability than CVE-2008-1447.

Severity
Medium 5.8
Published
4 Sept 2008
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
2.4% in the next 30 daysHigher than 84% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper authentication (CWE-287)
Attack
Over the network · No login needed
Attacker can
Change some data · Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
RubyServers and applications · cpe:a:ruby-lang:ruby
  • Version 1.8.7-p22
  • Version 1.8.7-p17
  • Version 1.8.7
  • Version 1.8.7-preview4
All 27 release lines
  • Every version up to 1.8.5
  • Every version up to 1.8.6
  • Every version up to 1.8.7
  • Every version up to 1.9
  • Version 1.6
  • Version 1.6.8
  • Version 1.8.0
  • Version 1.8.1
  • Version 1.8.2
  • Version 1.8.3
  • Version 1.8.4
  • 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 1.8.7-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

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2008-3905
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2008-3905