Vulnerability Description
The DH_check_pub_key function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange, which makes it easier for remote attackers to discover a private DH exponent by making multiple handshakes with a peer that chose an inappropriate number, as demonstrated by a number in an X9.42 file.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openssl | Openssl | 1.0.2 |
Related Weaknesses (CWE)
References
- http://intothesymmetry.blogspot.com/2016/01/openssl-key-recovery-attack-on-dh-sm
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176373.ht
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html
- http://www.openssl.org/news/secadv/20160128.txtVendor Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.securityfocus.com/bid/82233
- http://www.securityfocus.com/bid/91787
- http://www.securitytracker.com/id/1034849
- http://www.ubuntu.com/usn/USN-2883-1
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=878e2c5b13010329c203f309ed
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=c5b831f21d0d29d1e517d139d9
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na
FAQ
What is CVE-2016-0701?
CVE-2016-0701 is a vulnerability with a CVSS score of 3.7 (LOW). The DH_check_pub_key function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange, which makes it easier for ...
How severe is CVE-2016-0701?
CVE-2016-0701 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-0701?
Check the references section above for vendor advisories and patch information. Affected products include: Openssl Openssl.