2016-03-01 - OpenSSL Vulnerabilities (DROWN)
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*March 1, 2016* OpenSSL announced the following security advisories:  https://www.openssl.org/news/secadv/20160301.txt

Advisory CVEs
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* CVE-2016-0800 - **Cross-protocol attack on TLS using SSLv2 (DROWN)**  (Severity:High)

  This issue affects OpenSSL versions 1.0.1 and 1.0.2.

  OpenSSL 1.0.2 users should upgrade to 1.0.2g
  OpenSSL 1.0.1 users should upgrade to 1.0.1s

* CVE-2016-0705 - **Double-free in DSA code** (Severity:Low)

  This issue affects OpenSSL versions 1.0.2 and 1.0.1.

  OpenSSL 1.0.2 users should upgrade to 1.0.2g
  OpenSSL 1.0.1 users should upgrade to 1.0.1s

* CVE-2016-0798  - **Memory leak in SRP database lookups** (Severity:Low)

  This issue affects OpenSSL versions 1.0.2 and 1.0.1.

  OpenSSL 1.0.2 users should upgrade to 1.0.2g
  OpenSSL 1.0.1 users should upgrade to 1.0.1s

* CVE-2016-0797  - **BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption** (Severity:Low)

  This issue affects OpenSSL versions 1.0.2 and 1.0.1.

  OpenSSL 1.0.2 users should upgrade to 1.0.2g
  OpenSSL 1.0.1 users should upgrade to 1.0.1s


* CVE-2016-0797  - **Fix memory issues in BIO_*printf functions** (Severity:Low)

  This issue affects OpenSSL versions 1.0.2 and 1.0.1.

  OpenSSL 1.0.2 users should upgrade to 1.0.2g
  OpenSSL 1.0.1 users should upgrade to 1.0.1s


* CVE-2016-0702  - **Side channel attack on modular exponentiation** (Severity:Low)

  This issue affects OpenSSL versions 1.0.2 and 1.0.1.

  OpenSSL 1.0.2 users should upgrade to 1.0.2g
  OpenSSL 1.0.1 users should upgrade to 1.0.1s

* CVE-2016-0703  - **Divide-and-conquer session key recovery in SSLv2** (Severity:High)

  This issue affected OpenSSL versions 1.0.2, 1.0.1l, 1.0.0q, 0.9.8ze and all earlier versions.  It was fixed in OpenSSL 1.0.2a, 1.0.1m, 1.0.0r and 0.9.8zf

* CVE-2016-0704  - **Bleichenbacher oracle in SSLv2** (Severity:Moderate)

  This issue affected OpenSSL versions 1.0.2, 1.0.1l, 1.0.0q, 0.9.8ze and all earlier versions.  It was fixed in OpenSSL 1.0.2a, 1.0.1m, 1.0.0r and 0.9.8zf


Action
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xCAT uses OpenSSL for client-server communication but **does not** ship it.  Regarding CVE-2016-0800, xCAT also does not use SSLv2 layer but uses the newer TLS transport layer security.

It is recommended to keep your OpenSSL levels up-to-date with the indicated versions in the security bulletins to prevent any potential security threats.