Python RSA allows attackers to spoof signatures

MOYENNE 5.3CVE-2016-1494 · GHSA-8rjr-6qq5-pj9p · PYSEC-2016-10 · Published 13/01/2016 · updated 17/06/2026

Package	Affected versions	Patched versions
rsa PyPI	`< 3.3`	`3.3`
rsa python	`< 3.3`	`3.3`

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.

NVD 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.

References

nvd.nist.gov/vuln/detail/CVE-2016-1494 · ADVISORY
sybrenstuvel/python-rsa commit ab5d21c · WEB
bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff · WEB
blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa · WEB
pypa/advisory-database · WEB
sybrenstuvel/python-rsa · PACKAGE
web.archive.org/web/20210123020914/http://www.securityfocus.com/bid/79829 · WEB
lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html · WEB
lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html · WEB
lists.opensuse.org/opensuse-updates/2016-01/msg00032.html · WEB
openwall.com/lists/oss-security/2016/01/05/1 · WEB
openwall.com/lists/oss-security/2016/01/05/3 · WEB
securityfocus.com/bid/79829 · Third Party Advisory
blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa · Exploit
GitHub Advisory GHSA-8rjr-6qq5-pj9p · ADVISORY

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