TLS-SSL - CVE-2016-2182 Subscribe to Security Advisories

Thursday, August 9, 2018
Thursday, August 9, 2018
Summary 

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-2016-2182 CVSS 3.0 9.8 Critical OOB write in BN_bn2dec()

Affected Releases

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 AffectedReleases 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

Workarounds and Mitigations 

None.

Software Updates 

Software updates that address these vulnerabilities are or will be published at the following URL:
https://www.a10networks.com/support/axseries/software-downloads

Vulnerability Details

The following table shares brief descriptions of the vulnerabilities addressed in this document.

Vulnerability IDVulnerability Description
CVE-2016-2182

"The function BN_bn2dec() does not check the return value of BN_div_word(). This can cause an OOB write if an application uses this function with an overly large BIGNUM. This could be a problem if an overly large certificate or CRL is printed out from an untrusted source. TLS is not affected because record limits will reject an oversized certificate before it is parsed.

OpenSSL 1.0.2 users should upgrade to 1.0.2i
OpenSSL 1.0.1 users should upgrade to 1.0.1u

Acknowledgements 

None.

Modification History 
RevisionDateDescription
1.0
August 09, 2018

Initial Publication

Download PDF