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CVE-2008-3656

UnknownEPSS 70.20%

Last modified

CVE-2008-3656 is a vulnerability of currently unknown severity. Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick 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 context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.. EPSS estimates a 70.20% chance of exploitation in the next 30 days.

Description

Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick 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 context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.

Metrics

EPSS Probability
70.20%

99.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
Ruby-LangRuby<= 1.8.5—
Ruby-LangRuby1.6.8—
Ruby-LangRuby1.8.0—
Ruby-LangRuby1.8.1—
Ruby-LangRuby1.8.2—
Ruby-LangRuby1.8.3—
Ruby-LangRuby1.8.4—
Ruby-LangRuby1.8.5P11
Ruby-LangRuby1.8.6—
Ruby-LangRuby1.8.7—
Ruby-LangRuby1.9.0—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2008-3656?
Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick 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 context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.
How severe is CVE-2008-3656?
Severity scoring for CVE-2008-3656 is pending analysis. The EPSS model estimates a 70.20% probability of exploitation in the next 30 days.
How do I fix CVE-2008-3656?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2008-3656?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST