CVE-2014-3517

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-08-07 · updated 2026-06-17
Weakness: CWE-200

Description

api/metadata/handler.py in OpenStack Compute (Nova) before 2013.2.4, 2014.x before 2014.1.2, and Juno before Juno-2, when proxying metadata requests through Neutron, makes it easier for remote attackers to guess instance ID signatures via a brute-force attack that relies on timing differences in responses to instance metadata requests.

Affected products

OpenStack Nova: from 2013.2 through 2013.2.4; from 2014.1 before 2014.1.2; 2014.2.0-milestone1 — fixed in 2014.1.2

How to fix

Upgrade to a fixed version: OpenStack Nova 2014.1.2. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2014/07/17/2
https://bugs.launchpad.net/nova/+bug/1325128
http://www.openwall.com/lists/oss-security/2014/07/17/2
https://bugs.launchpad.net/nova/+bug/1325128

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