Encrypt-Then-Mac renegotiation crash
Summary
| CVE | CVE-2017-3733 |
|---|---|
| State | PUBLISHED |
| Assigner | openssl |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2017-05-04 19:29:00 UTC |
| Updated | 2025-04-20 01:37:25 UTC |
| Description | During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected. |
Risk And Classification
Primary CVSS: v3.0 7.5 HIGH from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-20 | protocol error
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Hp | Operations Agent | 11.14 | All | All | All |
| Application | Hp | Operations Agent | 11.15 | All | All | All |
| Application | Openssl | Openssl | 1.1.0 | All | All | All |
| Application | Openssl | Openssl | 1.1.0a | All | All | All |
| Application | Openssl | Openssl | 1.1.0b | All | All | All |
| Application | Openssl | Openssl | 1.1.0c | All | All | All |
| Application | Openssl | Openssl | 1.1.0d | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | OpenSSL | OpenSSL | affected openssl-1.1.0 | Not specified |
| CNA | OpenSSL | OpenSSL | affected openssl-1.1.0a | Not specified |
| CNA | OpenSSL | OpenSSL | affected openssl-1.1.0b | Not specified |
| CNA | OpenSSL | OpenSSL | affected openssl-1.1.0c | Not specified |
| CNA | OpenSSL | OpenSSL | affected openssl-1.1.0d | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| OpenSSL CVE-2017-3733 Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | Third Party Advisory, VDB Entry |
| OpenSSL Flaw in Encrypt-Then-Mac Extension Negotiation Lets Remote Authenticated Users Cause the Target Service to Crash - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Don't change the state of the ETM flags until CCS processing · openssl/openssl@4ad9361 · GitHub | af854a3a-2127-422b-91ae-364da2661108 | github.com | |
| www.openssl.org/news/secadv/20170216.txt | af854a3a-2127-422b-91ae-364da2661108 | www.openssl.org | Vendor Advisory |
| Oracle Critical Patch Update - October 2017 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | |
| Oracle Critical Patch Update - January 2018 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | |
| Document Display | HPE Support Center | af854a3a-2127-422b-91ae-364da2661108 | h20566.www2.hpe.com | Third Party Advisory, VDB Entry |
| Oracle Critical Patch Update Advisory - April 2019 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Joe Orton (Red Hat) (en)
There are currently no legacy QID mappings associated with this CVE.