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CVE-2015-3183

UnknownEPSS 73.33%

Last modified

CVE-2015-3183 is a vulnerability of currently unknown severity. The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.. EPSS estimates a 73.33% chance of exploitation in the next 30 days.

Description

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

Metrics

EPSS Probability
73.33%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheHttp Server>= 2.2.0, < 2.2.31
ApacheHttp Server>= 2.4.0, < 2.4.16

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2015-3183?
The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.
How severe is CVE-2015-3183?
Severity scoring for CVE-2015-3183 is pending analysis. The EPSS model estimates a 73.33% probability of exploitation in the next 30 days.
How do I fix CVE-2015-3183?
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.

How Strix Helps

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Source: NVD / NIST