#VU50990 Integer overflow in cryptography
Vulnerability identifier: #VU50990
Vulnerability risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-190
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
cryptography
Other software /
Other software solutions
Vendor: Python Cryptographic Authority
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow when processing certain sequences of update calls to symmetrically encrypt multi-GB values. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
cryptography: 3.3 - 3.3.1
External links
http://github.com/pyca/cryptography/blob/master/CHANGELOG.rst
http://github.com/pyca/cryptography/compare/3.3.1...3.3.2
http://github.com/pyca/cryptography/issues/5615
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
