CVE-2017-3730 Bad (EC)DHE parameters cause a client crash

What is CVE-2017-3730?

CVE-2017-3730 is a high-severity vulnerability in Openssl Openssl, published on 4 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack.

Weakness: CWE-476

Which versions are affected by CVE-2017-3730?

It affects 7 products.

Products include Openssl Openssl, Oracle Agile Engineering Data Management, Oracle Communications Application Session Controller, Oracle Communications Eagle Lnp Application Processor, Oracle Communications Operations Monitor, Oracle Jd Edwards Enterpriseone Tools and 1 more.

How do I fix CVE-2017-3730?

Upgrade to a fixed version.

Is CVE-2017-3730 being exploited?

There is no known exploitation of CVE-2017-3730 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.

Other vulnerabilities in Openssl Openssl

• CVE-2009-3245 Null dereference in n/a Critical 10.0
• CVE-2006-3738 Memory corruption in n/a Critical 10.0
• CVE-2026-63073 Untrusted Sender DN Used as Format String in CMP Response Validation Critical 9.8
• CVE-2016-6309 Use after free in n/a Critical 9.8
• CVE-2016-0799 Integer overflow in n/a Critical 9.8

All Openssl Openssl vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-3730, GHSA-rq64-8m54-26j4.