OSSA-2015-015: Nova instance migration process does not stop when instance is deleted

Date

August 25, 2015

CVE

CVE-2015-3241

Affects

  • Nova: versions through 2014.2.3 and 2015.1 versions through 2015.1.1

Description

George Shuklin from Webzilla LTD reported a vulnerability in Nova migration process. By resizing and deleting an instance repeatedly an authenticated user may overcome his quota and overload Nova computes node resulting in a denial of service attack. All Nova setups are affected.

Credits

  • George Shuklin from Webzilla LTD (CVE-2015-3241)

Notes

  • This fix requires oslo.concurrency >= 1.8.2 for Kilo and >= 2.3.0 for Liberty. Juno fix embeds a patched version of oslo.concurrency

  • This fix will be included in future 2014.2.4 (juno) and 2015.1.2 (kilo) releases.