CVE-2016-1494
medium
CVSS v3
5.3
CVSS v4 NEW
—
VIR risk
5.3
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.
Predictions
Exploit likelihood
63%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| suse | 42.1 | affected | |
| suse | 13.1 | affected | |
| suse | 13.2 | affected | |
| fedora | 22 | affected | |
| fedora | 23 | affected | |
| debian | bookworm | fixed | 3.2.3-1.1 |
| debian | bullseye | fixed | 3.2.3-1.1 |
| debian | forky | fixed | 3.2.3-1.1 |
| debian | sid | fixed | 3.2.3-1.1 |
| debian | trixie | fixed | 3.2.3-1.1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | rsa | <3.3 | 3.3 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| python | rsa | {"endExcluding":"3.3"} | 3.3 |
References
- https://www.suse.com/security/cve/CVE-2016-1494.html
- 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
- http://www.securityfocus.com/bid/79829
- https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff
- https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
- https://nvd.nist.gov/vuln/detail/CVE-2016-1494
- https://github.com/sybrenstuvel/python-rsa/commit/ab5d21c3b554f926d51ff3ad9c794bcf32e95b3c
- 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
- https://github.com/sybrenstuvel/python-rsa
- https://web.archive.org/web/20210123020914/http://www.securityfocus.com/bid/79829
- https://security-tracker.debian.org/tracker/CVE-2016-1494
CWEs
CWE-20
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.