python-django: User enumeration through timing difference on password hasher work factor upgrade
Published Apr 8, 2016
2.3
LOWCVSS 4.0
EPSS 3.35%
Description
The password hasher in contrib/auth/hashers.py in Django before 1.8.10 and 1.9.x before 1.9.3 allows remote attackers to enumerate users via a timing attack involving login requests.
Affected products
No data.
- 1.8.9
- 1.9
- 1.9.1
- 1.9.2
No data.
Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6
python-django-0:1.6.11-5.el6ost
Fixed · RHSA-2016:0502
Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7
python-django-0:1.6.11-5.el7ost
Fixed · RHSA-2016:0506
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
python-django-0:1.6.11-5.el7ost
Fixed · RHSA-2016:0505
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
python-django-0:1.8.11-1.el7ost
Fixed · RHSA-2016:0504
Red Hat Enterprise Linux OpenStack Platform 7.0 Operational Tools for RHEL 7
python-django-0:1.6.11-5.el7ost
Fixed · RHSA-2016:0503
Red Hat Ceph Storage 1.2
Django
Will not fix
Red Hat Ceph Storage 1.3
Django
Will not fix
Red Hat OpenStack Platform 8 (Liberty)
python-django
Not affected
Red Hat OpenStack Platform 8 (Liberty) Operational Tools
python-django
Not affected
Red Hat Subscription Asset Manager
Django
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 | python-django-0:1.6.11-5.el6ost | Fixed | RHSA-2016:0502 |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 | python-django-0:1.6.11-5.el7ost | Fixed | RHSA-2016:0506 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | python-django-0:1.6.11-5.el7ost | Fixed | RHSA-2016:0505 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | python-django-0:1.8.11-1.el7ost | Fixed | RHSA-2016:0504 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 Operational Tools for RHEL 7 | python-django-0:1.6.11-5.el7ost | Fixed | RHSA-2016:0503 |
| Red Hat Ceph Storage 1.2 | Django | Will not fix | n/a |
| Red Hat Ceph Storage 1.3 | Django | Will not fix | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | python-django | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) Operational Tools | python-django | Not affected | n/a |
| Red Hat Subscription Asset Manager | Django | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
AV:N/AC:H/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.35% (0.03345) | 88.27th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.32% (0.03317) | 86.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.08% (0.01082) | 76.32th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.72% (0.00723) | 81.30th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.72% (0.00723) | 80.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.72% (0.00723) | 77.61th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.41% (0.03407) | 84.65th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.41% (0.03407) | 83.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.41% (0.03407) | 66.20th | v2 (v2022.01.01) |
References (23)
- http://rhn.redhat.com/errata/RHSA-2016-0502.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-0504.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-0505.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-0506.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2016/dsa-3544 vendor-advisoryx_refsource_DEBIAN
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/83878 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1035152 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2915-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2915-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2915-3 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-2513 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1311438 Issue Tracking
- https://github.com/advisories/GHSA-fp6p-5xvw-m74f Advisory
- https://github.com/django/django/commit/67b46ba7016da2d259c1ecc7d666d11f5e1cfaab x_refsource_CONFIRM
- https://github.com/django/django/commit/af7d09b0c5c6ab68e629fd9baf736f9dd203b18e
- https://github.com/django/django/commit/f4e6e02f7713a6924d16540be279909ff4091eb6
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2016-16.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2016-2513
- https://web.archive.org/web/20160322001143/http://www.securitytracker.com/id/1035152
- https://web.archive.org/web/20200228001222/http://www.securityfocus.com/bid/83878
- https://www.cve.org/CVERecord?id=CVE-2016-2513
- https://www.djangoproject.com/weblog/2016/mar/01/security-releases x_refsource_CONFIRMVendor Advisory
Change history (0)
No recorded changes yet.