THREATPORT/VULNERABILITY/CVE-2016-5699
MEDIUM SEVERITY

CVE-2016-5699

Python vulnerability

CVSS
6.1
EPSS
10.2%
EPSS pct
95th
Exploited
No known
CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL.
Affected vendor
Python
Affected product
Python
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness type (CWE)
  • CWE-113 — HTTP Response Splitting
Published
2016-09-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 10.2% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2016-5699

  • Confirm whether Python Python is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-5699.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-5699

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-5699 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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