Vulnerability in Python
CVE-2016-5699
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.099 (95.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.099 · newest: 0.099 · change: 0.000
Affected products
- Python — versions 3.0, 3.0.1, 3.1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.splunk.com/view/SP-CAAAPUE
- hg.python.org/cpython/rev/1c45047c5102 (Patch)
- rhn.redhat.com/errata/RHSA-2016-1630.html (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2016-1627.html (vendor-advisory)
- hg.python.org/cpython/rev/bf3e1c9b80e9 (Patch)
- rhn.redhat.com/errata/RHSA-2016-1629.html (vendor-advisory)
- www.splunk.com/view/SP-CAAAPSV
- www.openwall.com/lists/oss-security/2016/06/16/2 (mailing-list, Mailing List)
- lists.debian.org/debian-lts-announce/2019/02/msg00011.html (mailing-list)
- www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
Frequently asked questions
- What is CVE-2016-5699?
- CVE-2016-5699 is a medium-severity vulnerability in Python, classified under HTTP Response Splitting. CVSS score: 6.1/10. Published 2016-09-02.
- How severe is CVE-2016-5699?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2016-5699 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.