CVE-2016-1494
MEDIUM5.3EPSS 3.1%Python RSA allows attackers to spoof signatures
Published: 5/14/2022Modified: 4/28/2026
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 packages (3)
- Debian/python-rsafrom 0, < 3.2.3-1.1
- PyPI/rsafrom 0, < 3.3
- PyPI/rsafrom 0, < 3.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
References (15)
- ADVISORYhttps://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2016-1494
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2016-1494
- PATCHhttps://github.com/sybrenstuvel/python-rsa
- WEBhttp://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html
- WEBhttp://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html
- WEBhttp://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html
- WEBhttps://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff
- WEBhttps://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2016-10.yaml
- WEBhttps://github.com/sybrenstuvel/python-rsa/commit/ab5d21c3b554f926d51ff3ad9c794bcf32e95b3c
- WEBhttps://web.archive.org/web/20210123020914/http://www.securityfocus.com/bid/79829
- WEBhttp://www.openwall.com/lists/oss-security/2016/01/05/1
- WEBhttp://www.openwall.com/lists/oss-security/2016/01/05/3
- WEBhttp://www.securityfocus.com/bid/79829