7-Zip  - 7 Zip Vulnerability - Critical Security Vulnerability Affects All the Versions of 7-Zip Prior to 18.05

7-Zip is a free open source archiver with a high compression ratio. It is under the License of GNU LGPL & BSD 3-clause and can be used in any computers, including computers in the commercial organization.

The software is in use for more than 18 years its initial release was on 18 July 1999 and the last stable release on April 30, 2018, version 18.05.

A arbitrary code execution discovered in 7-Zip all the of the software to 18.05.

By exploiting this vulnerability attackers could gain full access associated with the user profile and they can install view, change, or delete data; or create new accounts with full user rights.

Admin user accounts will be highly impacted by this vulnerability and the low privileged users are less impacted.

According to Center of Security threat intelligence “There are currently no reports of this vulnerability being exploited in the wild”.

The vulnerability is due to lack of address space layout randomization (ASLR) on the main executables (7zFM.exe, 7zG.exe, 7z.exe) which cause memory corruptions that lead to arbitrary code execution (CVE-2018-10115).

Mitigations

  • Update 7-Zip to the latest version 18.05.
  • Running the software as a non-privileged user.
  • Apply minimal privilege to all systems and services.



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