CVE-2013-6391

Exp

The ec2tokens API in OpenStack Identity (Keystone) before Havana 2013.2.1 and Icehouse before icehouse-2 does not return a trust-scoped token when one is received, which allows remote trust users to gain privileges by generating EC2 credentials from a trust-scoped token and using them in an ec2tokens API request.

Published: 2013-12-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-6391 is rated High Exploit Risk (68.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.24%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.72% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-6391

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-6391

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.52% 2.24% +1.72%
2 2025-03-30 0.77% 0.52% -0.25%
3 2025-03-29 — 0.77% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-6391

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2013-6391

OS Trackers for CVE-2013-6391

vendor priority summary link
debian not yet assigned CVE-2013-6391 not yet assigned priority: Debian including 1 source packages (keystone), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-6391
redhat medium — https://access.redhat.com/security/cve/CVE-2013-6391
ubuntu medium CVE-2013-6391 medium priority: Ubuntu including 1 source packages (keystone), 6 status rows across 6 suites (lucid, precise, quantal, raring, saucy, upstream): not-affected 2, DNE 1, ignored 1, needed 1, released 1. https://ubuntu.com/security/CVE-2013-6391

Affected software / configurations for CVE-2013-6391

Vendor Product Version Raw CPE
openstack keystone >= 2013.2, < 2013.2.1 cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*
canonical ubuntu_linux 13.10 cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*
redhat openstack 4.0 cpe:2.3:a:redhat:openstack:4.0:*:*:*:*:*:*:*

References for CVE-2013-6391

URL Tags
http://rhn.redhat.com/errata/RHSA-2014-0089.html Third Party Advisory
http://secunia.com/advisories/56079 Third Party Advisory
http://secunia.com/advisories/56154 Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/12/11/7 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/64253 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2061-1 Third Party Advisory
https://bugs.launchpad.net/keystone/+bug/1242597 Exploit Issue Tracking Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/89657 Third Party Advisory VDB Entry
cvelogic Threat Intelligence