CVE-2017-3730
HighPublic exploitIn 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.
Published May 4, 2017 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2017-3730
Key Facts
Patch immediately- CVE-2017-3730 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting OpenSSL, Agile Engineering Data Management (Oracle), Communications Application Session Controller (Oracle) and 5 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 55% probability of exploitation in the next 30 days.
- Fixed versions are available, including OpenSSL 1.1.0d-1, rootio-openssl 1.1.0d-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
55%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2017-3730 brief as a PDF
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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.
Affected Products
32 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OpenSSLOpenssl | 1.1.0, 1.1.0a, 1.1.0b, 1.1.0c, >= openssl-1.1.0 | 1.1.0d-1 |
| Agile Engineering Data ManagementOracle | 6.1.3, 6.2.0 | n/a |
| Communications Application Session ControllerOracle | 3.7.1, 3.8.0 | n/a |
| Communications Eagle Lnp Application ProcessorOracle | 10.0, 10.1, 10.2 | n/a |
| Communications Operations MonitorOracle | 3.4, 4.0 | n/a |
Patched Releases
OpenSSL
1.1.0d-1
rootio-openssl
1.1.0d-1
Timeline
Publicly disclosed
May 4, 2017
Last updated
Aug 4, 2026
Weakness Type
- CWE-476 NULL Pointer Dereference
References
- advisoryGLSA-201702-07
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2017-3730
- advisoryhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us
- advisory95812
- advisory1037717
FAQ
Common Questions.
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.
Affected: OpenSSL versions 1.1.0, 1.1.0a, 1.1.0b, 1.1.0c, >= openssl-1.1.0; Agile Engineering Data Management (Oracle) versions 6.1.3, 6.2.0; Communications Application Session Controller (Oracle) versions 3.7.1, 3.8.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including OpenSSL 1.1.0d-1, rootio-openssl 1.1.0d-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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