CVE-2016-1494: Input Validation
First published: Wed Jan 13 2016(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/rsa | <3.3 | 3.3 |
| python3-rsa | <3.3 | |
| Fedora | =22 | |
| Fedora | =23 | |
| SUSE Linux | =42.1 | |
| SUSE Linux | =13.1 | |
| SUSE Linux | =13.2 |
Remedy
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff
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Reference Links
- https://nvd.nist.gov/vuln/detail/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
- 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
- https://github.com/sybrenstuvel/python-rsa/commit/ab5d21c3b554f926d51ff3ad9c794bcf32e95b3c
- https://web.archive.org/web/20210123020914/http://www.securityfocus.com/bid/79829
- https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa
- https://github.com/advisories/GHSA-8rjr-6qq5-pj9p (Advisory)
- http://www.securityfocus.com/bid/79829
- https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
- https://github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2016-10.yaml
Frequently Asked Questions
What is the severity of CVE-2016-1494?
CVE-2016-1494 has a moderate severity rating due to its potential to allow spoofing of signatures.
How do I fix CVE-2016-1494?
To fix CVE-2016-1494, upgrade the RSA package for Python to version 3.3 or later.
Which versions are affected by CVE-2016-1494?
CVE-2016-1494 affects all versions of the RSA package prior to 3.3.
What type of attack is associated with CVE-2016-1494?
CVE-2016-1494 is associated with a crafted signature padding attack, known as a BERserk attack.
What software packages are vulnerable to CVE-2016-1494?
Software packages vulnerable to CVE-2016-1494 include Python-RSA versions before 3.3, Fedora versions 22 and 23, and openSUSE versions 13.1, 13.2, and 42.1.
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