Low severity · published Feb 15, 2016
CVE-2016-0701
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…
3.7
CVSS
83.6%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)83.6% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Openssl · Openssl
1.0.2; 1.0.2; 1.0.2; 1.0.2; 1.0.2a; 1.0.2b; +3 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-0701
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-0701
intothesymmetry.blogspot.com
http://intothesymmetry.blogspot.com/2016/01/openssl-key-recovery-attack-on-dh-small.html
kb.juniper.net
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
lists.fedoraproject.org
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176373.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html
Vendor Advisory
http://www.openssl.org/news/secadv/20160128.txt
www.oracle.com
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
More from Openssl
7.5
CVE-2014-0160
OpenSSL Information Disclosure Vulnerability
9.8
CVE-2026-63073
Untrusted Sender DN Used as Format String in CMP Response Validation
9.8
CVE-2026-31789
Heap Buffer Overflow in Hexadecimal Conversion
9.8
CVE-2022-2274
RSA implementation bug in AVX512IFMA instructions
9.8
CVE-2021-3711
SM2 Decryption Buffer Overflow