CVE-2016-1494
published 2016-01-13CVE-2016-1494: 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…
PriorityP433medium5.3CVSS 3.0
AVNACLPRNUINSUCNILAN
EPSS
7.05%
93.4th percentile
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
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | python-rsa | < python-rsa 3.2.3-1.1 (bookworm) | python-rsa 3.2.3-1.1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | azl3_mozjs_102.15.1-1_on_azure_linux_3.0 | — | — |
| opensuse | leap | — | — |
| opensuse | opensuse | — | — |
| opensuse | opensuse | — | — |
| python-rsa_project | python-rsa | >= 0 < 3.2.3-1.1 | 3.2.3-1.1 |
| python-rsa_project | python-rsa | >= 0 < 3.2.3-1.1 | 3.2.3-1.1 |
| python-rsa_project | python-rsa | >= 0 < 3.2.3-1.1 | 3.2.3-1.1 |
| python-rsa_project | python-rsa | >= 0 < 3.2.3-1.1 | 3.2.3-1.1 |
| python | rsa | < 3.3 | 3.3 |
| rustcrypto | rsa | >= 0 < 3.3 | 3.3 |
CVSS provenance
nvdv3.05.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
osv5.3MEDIUM
vendor_debian5.3MEDIUM
vendor_msrc5.3MEDIUM
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Microsoft
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.
vendor_msrc·2016-01-12·CVSS 5.3
CVE-2016-1494 [MEDIUM] CWE-20 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.
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.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to
Debian
CVE-2016-1494: python-rsa - The verify function in the RSA package for Python (Python-RSA) before 3.3 allows...
vendor_debian·2016·CVSS 5.3
CVE-2016-1494 [MEDIUM] CVE-2016-1494: python-rsa - The verify function in the RSA package for Python (Python-RSA) before 3.3 allows...
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.
Scope: local
bookworm: resolved (fixed in 3.2.3-1.1)
bullseye: resolved (fixed in 3.2.3-1.1)
forky: resolved (fixed in 3.2.3-1.1)
sid: resolved (fixed in 3.2.3-1.1)
trixie: resolved (fixed in 3.2.3-1.1)
GHSA
Python RSA allows attackers to spoof signatures
ghsa·2022-05-14
CVE-2016-1494 [MEDIUM] CWE-20 Python RSA allows attackers to spoof signatures
Python RSA allows attackers to spoof signatures
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.
OSV
Python RSA allows attackers to spoof signatures
osv·2022-05-14
CVE-2016-1494 [MEDIUM] Python RSA allows attackers to spoof signatures
Python RSA allows attackers to spoof signatures
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.
OSV
CVE-2016-1494: The verify function in the RSA package for Python (Python-RSA) before 3
osv·2016-01-13·CVSS 5.3
CVE-2016-1494 [MEDIUM] CVE-2016-1494: The verify function in the RSA package for Python (Python-RSA) before 3
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack
bugzilla·2016-01-05·CVSS 5.3
CVE-2016-1494 [MEDIUM] CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack
CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack
It was found that python-rsa is vulnerable to Bleichenbacher'06 attack, allowing attacker to fake signatures for any public key with low exponent.
Upstream patch:
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff
CVE assignment:
http://seclists.org/oss-sec/2016/q1/18
External reference:
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
Discussion:
Created python-rsa tracking bugs for this issue:
Affects: fedora-all [bug 1295870]
Affects: epel-all [bug 1295871]
---
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the de
Bugzilla
CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack [epel-all]
bugzilla·2016-01-05·CVSS 5.3
CVE-2016-1494 [MEDIUM] CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack [epel-all]
CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported
Bugzilla
CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack [fedora-all]
bugzilla·2016-01-05·CVSS 5.3
CVE-2016-1494 [MEDIUM] CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack [fedora-all]
CVE-2016-1494 python-rsa: Signature forgery using Bleichenbacher'06 attack [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported ve
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.htmlhttp://lists.opensuse.org/opensuse-updates/2016-01/msg00032.htmlhttp://www.openwall.com/lists/oss-security/2016/01/05/1http://www.openwall.com/lists/oss-security/2016/01/05/3http://www.securityfocus.com/bid/79829https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diffhttps://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.htmlhttp://lists.opensuse.org/opensuse-updates/2016-01/msg00032.htmlhttp://www.openwall.com/lists/oss-security/2016/01/05/1http://www.openwall.com/lists/oss-security/2016/01/05/3http://www.securityfocus.com/bid/79829https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diffhttps://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
2016-01-13
Published