Quantum Secular Labs / Blog / Advisories

CVE-2016-0705: Openssl: Memory corruption

CVE-2016-0705 is rated critical with a CVSS v3.0 base score of 9.8 and affects Openssl, along with 4 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Double free vulnerability in the dsa_priv_decode function in crypto/dsa/dsa_ameth.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a malformed DSA private key.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Affected products

  • Openssl: 1.0.1; 1.0.1 beta1; 1.0.1 beta2; 1.0.1 beta3; 1.0.1a; 1.0.1b; 1.0.1c; 1.0.1d; 1.0.1e; 1.0.1f; 1.0.1g; 1.0.1h
  • Oracle Mysql: from 5.6.0 up to and including 5.6.29; from 5.7.0 up to and including 5.7.11
  • Google Android: 4.0; 4.0.1; 4.0.2; 4.0.3; 4.0.4; 4.1; 4.1.2; 4.2; 4.2.1; 4.2.2; 4.3; 4.3.1
  • Canonical Ubuntu Linux: 12.04; 14.04; 15.10
  • Debian Linux: 7.0; 8.0

References