CVE-2016-1494

Name: CVE-2016-1494
Creator: NVD / NIST
Published: 2016-01-13T15:59:02.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 7.05%

Last modified Jun 17, 2026

CVE-2016-1494 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 7.05% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

7.05%

93.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Python	Rsa	< 3.3
Fedoraproject	Fedora	22
Fedoraproject	Fedora	23
Opensuse	Leap	42.1
Opensuse	Opensuse	13.1
Opensuse	Opensuse	13.2

References

http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.htmlMailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/3Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/79829Third Party Advisory, VDB Entry
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diffPatch, Third Party Advisory
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/Exploit, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.htmlMailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/3Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/79829Third Party Advisory, VDB Entry
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diffPatch, Third Party Advisory
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/Exploit, Third Party Advisory

Timeline

Published: Jan 13, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-1494?

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.

How severe is CVE-2016-1494?

Severity scoring for CVE-2016-1494 is pending analysis. The EPSS model estimates a 7.05% probability of exploitation in the next 30 days.

How do I fix CVE-2016-1494?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST