Cryptographic issues in PyCrypto - CVE-2012-2417
Published: June 17, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43979
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-2417
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
PyCrypto
PyCrypto
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
PyCrypto before 2.6 does not produce appropriate prime numbers when using an ElGamal scheme to generate a key, which reduces the signature space or public key space and makes it easier for attackers to conduct brute force attacks to obtain the private key.
How to mitigate CVE-2012-2417
Install update from vendor's website.
Sources
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081713.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081759.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081789.html
- http://secunia.com/advisories/49263
- http://www.debian.org/security/2012/dsa-2502
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:117
- http://www.openwall.com/lists/oss-security/2012/05/25/1
- http://www.osvdb.org/82279
- http://www.securityfocus.com/bid/53687
- https://bugs.launchpad.net/pycrypto/+bug/985164
- https://exchange.xforce.ibmcloud.com/vulnerabilities/75871
- https://github.com/dlitz/pycrypto/blob/373ea760f21701b162e8c4912a66928ee30d401a/ChangeLog
- https://github.com/Legrandin/pycrypto/commit/9f912f13df99ad3421eff360d6a62d7dbec755c2
- https://hermes.opensuse.org/messages/15083589