High severity · published May 4, 2017
CVE-2017-3733
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…
7.5
CVSS
12.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)12.9% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Openssl · Openssl
1.1.0; 1.1.0a; 1.1.0b; 1.1.0c; 1.1.0d · source: NVD
OA
Operations Agent · HP
11.14; 11.15 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-3733
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-3733
www.oracle.com
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
www.oracle.com
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
Third Party Advisory
http://www.securityfocus.com/bid/96269
www.securitytracker.com
http://www.securitytracker.com/id/1037846
github.com
https://github.com/openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2
Third Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03728en_us
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