Information disclosure in OpenSSL
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 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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.836 (99.7th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.836 · newest: 0.836 · change: 0.000
Affected products
- OpenSSL — versions 1.0.2, 1.0.2a, 1.0.2b
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.fedoraproject.org/pipermail/package-announce/2016-January/176373.html (vendor-advisory)
- www.securitytracker.com/id/1034849 (vdb-entry)
- security.gentoo.org/glsa/201601-05 (vendor-advisory)
- www.securityfocus.com/bid/82233 (vdb-entry)
- www.securityfocus.com/bid/91787 (vdb-entry)
- www.kb.cert.org/vuls/id/257823 (third-party-advisory)
- lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html (vendor-advisory)
- www.ubuntu.com/usn/USN-2883-1 (vendor-advisory)
- www.oracle.com/security-alerts/cpuapr2020.html
- www.oracle.com/security-alerts/cpujul2020.html
Frequently asked questions
- What is CVE-2016-0701?
- CVE-2016-0701 is a low-severity vulnerability in OpenSSL, classified under Information Disclosure. CVSS score: 3.7/10. Published 2016-02-15.
- How severe is CVE-2016-0701?
- Low severity. CVSS v3 base score is 3.7 out of 10.
- Is CVE-2016-0701 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.