MEDIUM
The verify function in the RSA package for Python (Python-RSA) before 3.3 allows attackers to spoof signatures with a small public exponent via crafted signature padding, aka a BERserk attack
Published Jan 13, 2016
5.3
MEDIUMCVSS 3.0
EPSS 7.05%
Description
The verify function in the RSA package for Python (Python-RSA) before 3.3 allows attackers to spoof signatures with a small public exponent via crafted signature padding, aka a BERserk attack.
Affected products
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
5.3 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
7.05% 0.07054
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.07054
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 (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.05% (0.07054) | 94.01th | v5 (v2026.06.15) |
| Sep 22, 2026 | 7.05% (0.07054) | 93.91th | v5 (v2026.06.15) |
| Sep 21, 2026 | 8.32% (0.08318) | 94.77th | v5 (v2026.06.15) |
| Sep 6, 2026 | 7.05% (0.07054) | 93.77th | v5 (v2026.06.15) |
| Sep 5, 2026 | 8.32% (0.08318) | 94.65th | v5 (v2026.06.15) |
| Aug 30, 2026 | 7.05% (0.07054) | 93.73th | v5 (v2026.06.15) |
| Aug 28, 2026 | 8.32% (0.08318) | 94.62th | v5 (v2026.06.15) |
| Aug 24, 2026 | 7.05% (0.07054) | 93.70th | v5 (v2026.06.15) |
| Aug 23, 2026 | 8.32% (0.08318) | 94.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.05% (0.07054) | 93.36th | v5 (v2026.06.15) |
| May 1, 2026 | 3.13% (0.03132) | 86.93th | v4 (v2025.03.14) |
| Aug 18, 2025 | 5.09% (0.05091) | 89.42th | v4 (v2025.03.14) |
| Mar 30, 2025 | 7.71% (0.07710) | 91.10th | v4 (v2025.03.14) |
| Mar 29, 2025 | 13.67% (0.13668) | 90.41th | v4 (v2025.03.14) |
| Mar 28, 2025 | 7.71% (0.07710) | 91.11th | v4 (v2025.03.14) |
| Mar 27, 2025 | 13.67% (0.13668) | 93.27th | v4 (v2025.03.14) |
| Mar 20, 2025 | 7.71% (0.07710) | 91.20th | v4 (v2025.03.14) |
| Mar 19, 2025 | 13.67% (0.13668) | 93.42th | v4 (v2025.03.14) |
| Mar 17, 2025 | 7.71% (0.07710) | 91.30th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.43% (0.00428) | 75.22th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.43% (0.00428) | 73.71th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.43% (0.00428) | 70.41th | v3 (v2023.03.01) |
| Mar 6, 2023 | 19.17% (0.19173) | 96.36th | v2 (v2022.01.01) |
| Apr 1, 2022 | 19.17% (0.19173) | 96.03th | v2 (v2022.01.01) |
| Feb 4, 2022 | 19.17% (0.19173) | 93.71th | v2 (v2022.01.01) |
Weaknesses (2)
References (13)
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/05/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/05/3 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/79829 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff x_refsource_CONFIRMPatchThird Party Advisory
- https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa x_refsource_MISCExploitThird Party Advisory
- https://github.com/advisories/GHSA-8rjr-6qq5-pj9p Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2016-10.yaml
- https://github.com/sybrenstuvel/python-rsa/commit/ab5d21c3b554f926d51ff3ad9c794bcf32e95b3c
- https://nvd.nist.gov/vuln/detail/CVE-2016-1494
- https://web.archive.org/web/20210123020914/http://www.securityfocus.com/bid/79829
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 13, 2016
Updated Aug 5, 2024
Reserved Jan 4, 2016
Link CVE-2016-1494
CISA Vulnrichment
GHSA-8RJR-6QQ5-PJ9P Updated n/a