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Fencer Intel
low 3.5

CVE-2012-2101 json

Openstack Compute (Nova) Denial of service via network request that triggers large number of iptables rules

published 2012-06-07 14 y ago modified 2026-06-16 4 mo ago also GHSA-hq3f-9gf7-73r8 , PYSEC-2012-36 , EUVD-2012-0019

cvss
3.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

Openstack Compute (Nova) Folsom, 2012.1, and 2011.3 does not limit the number of security group rules, which allows remote authenticated users with certain permissions to cause a denial of service (CPU and hard drive consumption) via a network request that triggers a large number of iptables rules.

Patch / fix

  • pypi nova 12.0.0a0
  • nova Debian 14, Debian 13, Debian 12 2012.1-2

debian advisories DEBIAN-CVE-2012-2101

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-2101 updated cvss 4.0

openstack-nova: No quota enforced on security group rules

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:N/A:P

Affected packages

ecosystem package affected fixed in
pypi nova
<12.0.0a0
12.0.0a0

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.