6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.04 Low
EPSS
Percentile
91.9%
A specially crafted request can give a user access to another userβs session, allowing an attacker to hijack a random session.
This attack is known to be possible on certain Drupal 7 sites which serve both HTTP and HTTPS content (βmixed-modeβ), but it is possible there are other attack vectors for both Drupal 6 and Drupal 7.
Drupal 7 includes a password hashing API to ensure that user supplied passwords are not stored in plain text.
A vulnerability in this API allows an attacker to send specially crafted requests resulting in CPU and memory exhaustion. This may lead to the site becoming unavailable or unresponsive (denial of service).
This vulnerability can be exploited by anonymous users.
Install the latest version:
If you have configured a custom session.inc file for your Drupal 6 or Drupal 7 site you also need to make sure that it is not prone to the same session hijacking vulnerability disclosed in this security advisory.
If you have configured a custom password.inc file for your Drupal 7 site you also need to make sure that it is not prone to the same denial of service vulnerability disclosed in this security advisory. See also the similar security advisory for the Drupal 6 contributed Secure Password Hashes module: SA-CONTRIB-2014-113
Also see the Drupal core project page.
Session hijacking:
Denial of service:
Session hijacking:
Denial of service:
twitter.com/drupalsecurity
www.drupal.org/contact
www.drupal.org/drupal-6.34-release-notes
www.drupal.org/drupal-7.34-release-notes
www.drupal.org/https-information
www.drupal.org/node/2378367
www.drupal.org/project/drupal
www.drupal.org/security-team
www.drupal.org/security-team/risk-levels
www.drupal.org/security/secure-configuration
www.drupal.org/u/c0r3dump3d
www.drupal.org/u/David_Rothstein
www.drupal.org/u/Heine
www.drupal.org/u/jnietotn
www.drupal.org/u/klausi
www.drupal.org/u/MichaelCu
www.drupal.org/u/pwolanin
www.drupal.org/u/tsphethean
www.drupal.org/user/1317732
www.drupal.org/writing-secure-code