Information disclosure in PyCrypto



Published: 2018-02-23 | Updated: 2018-03-16
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-6594
CWE-ID CWE-200
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		PyCrypto
Client/Desktop applications / Encryption software

Vendor GNU

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU11125

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-6594

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to obtain potentially sensitive information on the target system.

The weakness exists in the ElGamal implementation in PyCrypto due to generation of weak ElGamal key parameters by the source code in the lib/Crypto/PublicKey/ElGamal.py file. A remote attacker can gain access to potentially sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PyCrypto: 2.6.0 - 2.6.1

External links

http://github.com/dlitz/pycrypto/pull/256/commits/2f6c124e127b5dd98723e7e75a9825c4ed8bd5c7


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. However, proof of concept for this vulnerability is available.



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