It was discovered that some items in the S3Token paste configuration as used by python-keystonemiddleware (formerly python-keystoneclient) were incorrectly evaluated as strings, an issue similar to CVE-2014-7144. If the "insecure" option were set to "false", the option would be evaluated as true, resulting in TLS connections being vulnerable to man-in-the-middle attacks.
Note: the "insecure" option defaults to false, so setups that do not specifically define "insecure=false" are not affected.
DescriptionVasyl Kaigorodov
2015-04-07 14:59:56 UTC
A vulnerability was discovered in OpenStack:
Title: S3Token TLS cert verification option not honored
Reporter: Brant Knudson (IBM)
Products: keystonemiddleware, python-keystoneclient
Affects: versions up to 1.5.0 (keystonemiddleware),
versions up to 0.11.2 (python-keystoneclient)
Description:
Brant Knudson from IBM reported a vulnerability in keystonemiddleware
(formerly shipped as python-keystoneclient). When the 'insecure' option
is set in a S3Token paste configuration file its value is effectively
ignored and instead assumed to be true. As a result certificate
verification will be disabled, leaving TLS connections open to MITM
attacks. Note that it's unusual to explicitly add this option and then
set it to false, so the impact of this bug is thought to be limited. All
versions of s3_token middleware with TLS settings configured are
affected by this flaw.
Acknowledgements:
Red Hat would like to thank the OpenStack project for reporting this issue. Upstream acknowledges Brant Knudson from IBM as the original reporter.
Note that it's unusual to explicitly add this option and then
set it to false, so the impact of this bug is thought to be limited.
Comment 5Fedora Update System
2015-07-19 01:59:08 UTC
python-keystonemiddleware-1.3.2-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
A vulnerability was discovered in OpenStack: Title: S3Token TLS cert verification option not honored Reporter: Brant Knudson (IBM) Products: keystonemiddleware, python-keystoneclient Affects: versions up to 1.5.0 (keystonemiddleware), versions up to 0.11.2 (python-keystoneclient) Description: Brant Knudson from IBM reported a vulnerability in keystonemiddleware (formerly shipped as python-keystoneclient). When the 'insecure' option is set in a S3Token paste configuration file its value is effectively ignored and instead assumed to be true. As a result certificate verification will be disabled, leaving TLS connections open to MITM attacks. Note that it's unusual to explicitly add this option and then set it to false, so the impact of this bug is thought to be limited. All versions of s3_token middleware with TLS settings configured are affected by this flaw. Acknowledgements: Red Hat would like to thank the OpenStack project for reporting this issue. Upstream acknowledges Brant Knudson from IBM as the original reporter.