OSSA-2016-004: Swift proxy-server DoS through Large Object

OSSA-2016-004: Swift proxy-server DoS through Large Object

Date

January 20, 2016

CVE

CVE-2016-0737 (client to proxy), CVE-2016-0738 (proxy to server)

Affects

  • Swift: >=2.2.1 <= 2.3.0, >= 2.4.0 <= 2.5.0

Description

Romain LE DISEZ from OVH and Örjan Persson from Kiliaro independently reported two vulnerabilities in Swift Large Object. By repeatedly requesting and interrupting connections to a Large Object (Dynamic or Static) URL, a remote attacker may exhausts Swift proxy-server resources, potentially resulting in a denial of service. Note that there are two distinct bugs that can exhaust proxy resources, one for client connection (client to proxy), one for servers connection (proxy to server). All Swift setup are affected.

Patches

Credits

  • Romain LE DISEZ from OVH (CVE-2016-0737)

  • Örjan Persson from Kiliaro (CVE-2016-0738)

Notes

  • The client to proxy issue (CVE-2016-0737) is already fixed in Liberty

  • The remaining fix will be included in future 2.3.1 (Kilo) and 2.5.1 (Liberty) releases.

Creative Commons Attribution 3.0 License

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.