CVE-2015-5739

Description

The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allows remote attackers to conduct HTTP request smuggling attacks via a space instead of a hyphen, as demonstrated by "Content Length" instead of "Content-Length."

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 10.89% Top 10%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://seclists.org/oss-sec/2015/q3/292 third party advisory mailing list
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html third party advisory vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-1538.html third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1250352 issue tracking third party advisory patch
http://seclists.org/oss-sec/2015/q3/294 third party advisory mailing list
http://seclists.org/oss-sec/2015/q3/237 third party advisory mailing list
http://www.securityfocus.com/bid/76281 vdb entry third party advisory
https://github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9 issue tracking third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2015-5739?
CVE-2015-5739 has been scored as a critical severity vulnerability.
How to fix CVE-2015-5739?
To fix CVE-2015-5739, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-5739 being actively exploited in the wild?
It is possible that CVE-2015-5739 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~11% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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