Improper Input Validation Affecting python-rsa package, versions <3.2.3-1.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DEBIAN9-PYTHONRSA-266015
- published13 Jan 2016
- disclosed13 Jan 2016
Introduced: 13 Jan 2016
CVE-2016-1494 (opens in a new tab)How to fix?
Upgrade Debian:9 python-rsa to version 3.2.3-1.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python-rsa package and not the python-rsa package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
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
- https://security-tracker.debian.org/tracker/CVE-2016-1494
- https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html
- https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
- http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html
- http://www.openwall.com/lists/oss-security/2016/01/05/1
- http://www.openwall.com/lists/oss-security/2016/01/05/3
- http://www.securityfocus.com/bid/79829
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-1494