Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2015-1852

17
FAUCET Score

CVE-2015-1852 describes a vulnerability in the s3_token middleware of OpenStack keystonemiddleware before 1.6.0 and python-keystoneclient before 1.4.0. It allows remote attackers to perform Man-in-the-Middle (MitM) attacks by disabling certificate verification when the "insecure" option is present in a paste configuration file, regardless of its value. This vulnerability has a CVSS score of 4.3 (Medium), indicating a network-based attack with medium complexity, requiring no authentication, and impacting integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.5.0CPE matchmatch criteria
cpe:2.3:a:openstack:keystonemiddleware:*:*:*:*:*:*:*:*
<= 1.3.0CPE matchmatch criteria
cpe:2.3:a:openstack:python-keystoneclient:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
15.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.59%
Probability of exploitation in next 30 days
EPSS Percentile
83.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0259 is in the 75th percentile among its peer group of 19,953 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

pippatch availablevia ghsa
Product: keystonemiddlewareFixed in: 1.6.0
pippatch availablevia ghsa
Product: python-keystoneclientFixed in: 1.4.0
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6Fixed in: python-keystoneclient-1:0.9.0-6.el6ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7Fixed in: python-keystoneclient-1:0.9.0-6.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7Fixed in: python-keystoneclient-1:0.11.1-2.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7Fixed in: python-keystonemiddleware-0:1.3.2-1.el7ost
View patch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 4Fixed in: python-keystoneclient

Vendor Advisories (2)

pipGHSA-p9wq-mjh8-q72mhigh

OpenStack keystonemiddleware and python-keystoneclient vulnerable to man-in-the-middle attacks

May 17, 2022
redhatCVE-2015-1852Moderate

keystonemiddleware/keystoneclient: S3Token TLS cert verification option not honored

Apr 15, 2015

References

lists.openstack.org / pipermail/openstack-announce/2015-April/000350.html
Vendor Advisory
rhn.redhat.com / errata/RHSA-2015-1677.html
rhn.redhat.com / errata/RHSA-2015-1685.html
bugs.launchpad.net / keystonemiddleware/+bug/1411063
oracle.com / technetwork/topics/security/bulletinapr2015-2511959.html
securityfocus.com / bid/74187
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2705-1
Third Party Advisory