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CVE-2013-4477

12
FAUCET Score

CVE-2013-4477 describes a privilege escalation vulnerability in the LDAP backend of OpenStack Identity (Keystone) Grizzly and Havana. When a local user attempts to remove a role they do not possess, the system incorrectly adds that role, granting them unintended privileges. The vulnerability has a CVSS score of 3.3, indicating a low severity with local access and medium attack complexity, potentially leading to partial confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:grizzly:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:havana:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

3.3LOW

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 82nd percentile among its peer group of 747 CVEs.

Social Chatter

No social media mentions found for this CVE.

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 (3)

pippatch availablevia ghsa
Product: keystoneFixed in: 8.0.0a0
redhatpatch availablevia redhat_api
Product: OpenStack 3 for RHEL 6Fixed in: openstack-keystone-0:2013.1.4-2.el6ost
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 4Fixed in: openstack-keystone

Vendor Advisories (2)

pipGHSA-f889-wfwm-6p7mlow

OpenStack Identity Keystone Privilege Escalation vulnerability

May 17, 2022
redhatCVE-2013-4477Moderate

openstack-keystone: unintentional role granting with Keystone LDAP backend

Oct 21, 2013

References

rhn.redhat.com / errata/RHSA-2014-0113.html
bugs.launchpad.net / keystone/+bug/1242855
Exploit
openwall.com / lists/oss-security/2013/10/30/6
Patch
ubuntu.com / usn/USN-2034-1