In September 2016, openssl.org released a security advisory detailing several security issues. The following vulnerabilities that may affect the TLS/SSL data plane of ACOS devices reported in that advisory are addressed in this document.
|Item #||Vulnerability ID||Score Source||Score||Summary|
|1||CVE-2016-6302||CVSS 3.0||7.5 High||Malformed SHA512 ticket DoS|
The table below indicates releases of ACOS exposed to these vulnerabilities and ACOS releases that address them. ACOS release families not indicated below are unaffected by these vulnerabilities.
Customers using affected ACOS releases can overcome vulnerability exposures by updating to the indicated resolved release. If the table does not list a corresponding resolved or unaffected release, then no ACOS release update is currently available.
|Releases Affected||Releases Resolved or Unaffected|
|4.1.4 – 4.1.4-P1||4.1.4-P2|
|4.1.2 – 4.1.2-P4||4.1.2-P5|
|4.1.1 – 4.1.1-P8||4.1.1-P9|
|4.1.0 – 4.1.0-P11||4.1.0-P12|
|2.7.2 – 2.7.2-P12||2.7.2-P13|
|2.7.1-GR1 – 2.7.1-GR1-Px||2.7.2-P13, 4.1.0-P12, 4.1.1-P9, 4.1.4-P2|
|2.6.1-GR1 – 2.6.1-GR1-P16||2.7.2-P13, 4.1.0-P12, 4.1.1-P9, 4.1.4-P2|
Software updates that address these vulnerabilities are or will be published at the following URL:
The following table shares brief descriptions of the vulnerabilities addressed in this document.
|Vulnerability ID||Vulnerability Description|
If a server uses SHA512 for TLS session ticket HMAC it is vulnerable to a DoS attack where a malformed ticket will result in an OOB read which will ultimately crash.
The use of SHA512 in TLS session tickets is comparatively rare as it requires a custom server callback and ticket lookup mechanism.
The following table shares brief descriptions for the vulnerabilities addressed in this document.
|Ref #||General Link|
|||NIST NVD, CVE-2016-6302|
|1.0||July 29, 2018||
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