CVE-2015-5143

The session backends in Django before 1.4.21, 1.5.x through 1.6.x, 1.7.x before 1.7.9, and 1.8.x before 1.8.3 allows remote attackers to cause a denial of service (session store consumption) via multiple requests with unique session keys.

Eric Peterson and Lin Hua Cheng discovered that a new empty record used to be created in the session storage every time a session was accessed and an unknown session key was provided in the request cookie. This could allow remote attackers to saturate the session store or cause other users' session records to be evicted (CVE-2015-5143).

Sjoerd Job Postmus discovered that some built-in validators did not properly reject newlines in input values. This could allow remote attackers to inject headers in emails and HTTP responses (CVE-2015-5144).

django.core.validators.URLValidator included a regular expression that was extremely slow to evaluate against certain inputs. This regular expression has been simplified and optimized (CVE-2015-5145).

The Mageia 4 python-django14 and Mageia 5 python-django packages have been updated to versions 1.4.21 and 1.8.3 respectively to fix these issues. Note that the CVE-2015-5145 issue only affected python-django.

Note: the python-django package in Mageia 4, based on Django 1.5.9, is no longer supported. Users of this package are advised to migrate to Mageia 5.

The session backends in Django before 1.4.21, 1.5.x through 1.6.x, 1.7.x before 1.7.9, and 1.8.x before 1.8.3 allows remote attackers to cause a denial of service (session store consumption) via multiple requests with unique session keys.

This update for python-Django fixes the following security issues:

• Prevent Denial-of-service possibility by filling session store. (bsc#937522, CVE-2015-5143)
• Prevent Header injection possibility. (bsc#937523, CVE-2015-5144)
• A remote denial of service (resource exhaustion) attack against the django session store was fixed in Python Django. This might have allowed remote attackers to exhaust existing web sessions. (bsc#941587, CVE-2015-5963)

This update for python-Django fixes the following security issues:

• Prevent Denial-of-service possibility by filling session store. (bsc#937522, CVE-2015-5143)
• Prevent Header injection possibility. (bsc#937523, CVE-2015-5144)
• A remote denial of service (resource exhaustion) attack against the django session store was fixed in Python Django. This might have allowed remote attackers to exhaust existing web sessions. (bsc#941587, CVE-2015-5963)

This update fixes the following security issues:

• (bnc#955412, CVE-2015-8213) Possible settings leak in date template filter

• (bnc#937522, CVE-2015-5143) Possible denial-of-service in session store

• (bnc#937523, CVE-2015-5144) Possible Header injection

• (bnc#941587, CVE-2015-5963) Possible denial-of-service by filling session store via logout()

The session backends in Django before 1.4.21, 1.5.x through 1.6.x, 1.7.x before 1.7.9, and 1.8.x before 1.8.3 allows remote attackers to cause a denial of service (session store consumption) via multiple requests with unique session keys.

Eric Peterson and Lin Hua Cheng discovered that Django incorrectly handled session records. A remote attacker could use this issue to cause a denial of service. (CVE-2015-5143)

Sjoerd Job Postmus discovered that DJango incorrectly handled newline characters when performing validation. A remote attacker could use this issue to perform header injection attacks. (CVE-2015-5144)