CVE-2013-0270 | Keystone: openstack keystone: denial of service via large http request with long tenant name

A flaw was found in OpenStack Keystone. A remote attacker could exploit this vulnerability by sending a large HTTP request, specifically by providing a long tenant name when requesting a token. This could lead to a denial of service, consuming excessive CPU and memory resources on the affected system.

Published: 2013-04-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-0270 is rated Moderate Risk (56.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.01%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2013-0270

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 2.68% 3.01% +0.33%
2 2026-04-07 1.81% 2.68% +0.87%
3 2025-03-30 — 1.81% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-0270

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2013-0270

GitHub Security Advisory for CVE-2013-0270

GHSA-4ppj-4p4v-jf4p · Severity: medium · Ecosystem: pip — OpenStack Keystone Denial of Service vulnerability via a large HTTP request

OS Trackers for CVE-2013-0270

vendor priority summary link
debian not yet assigned CVE-2013-0270 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-2013-0270
redhat medium — https://access.redhat.com/security/cve/CVE-2013-0270
suse medium — https://www.suse.com/security/cve/CVE-2013-0270/
ubuntu low CVE-2013-0270 low priority: Ubuntu including 1 source packages (keystone), 6 status rows across 6 suites (hardy, lucid, oneiric, precise, quantal, upstream): ignored 3, DNE 2, pending 1. https://ubuntu.com/security/CVE-2013-0270

Affected software / configurations for CVE-2013-0270

Vendor Product Version Raw CPE
openstack keystone >= 2012.1, <= 2012.1.3 cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*
openstack keystone >= 2012.2, <= 2012.2.4 cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*
openstack keystone 2013.1 cpe:2.3:a:openstack:keystone:2013.1:milestone1:*:*:*:*:*:*
openstack keystone 2013.1 cpe:2.3:a:openstack:keystone:2013.1:milestone2:*:*:*:*:*:*
openstack keystone 2013.1 cpe:2.3:a:openstack:keystone:2013.1:milestone3:*:*:*:*:*:*

References for CVE-2013-0270

cvelogic Threat Intelligence