Vulnerability Monitor

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CVE-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 signature padding, aka a BERserk attack.

Published

2016-01-13T15:59:02.787

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	python	rsa	< 3.3	Yes
Operating System	fedoraproject	fedora	22	Yes
Operating System	fedoraproject	fedora	23	Yes
Operating System	opensuse	leap	42.1	Yes
Operating System	opensuse	opensuse	13.1	Yes
Operating System	opensuse	opensuse	13.2	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2016/01/05/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2016/01/05/3 Mailing List, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/79829 Third Party Advisory, VDB Entry ([email protected])
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff Patch, Third Party Advisory ([email protected])
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/ Exploit, Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2016/01/05/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2016/01/05/3 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/79829 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)