Security restrictions bypass in 7-zip

1) Security restrictions bypass

EUVDB-ID: #VU12046

Risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:U]

CVE-ID: CVE-2018-10172

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The weakness exists due to improper security restrictions when using the large memory pages option. When using this option, the SeLockMemoryPrivilege privilege is added to the current user account using the LsaAddAccountRights function, which allows other applications on the system access to that privilege. A local attacker can execute an application on the system, which can run with SeLockMemoryPrivilege privileges, and bypass access restrictions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

7-Zip: 15.05 - 18.01

External links

http://sourceforge.net/p/sevenzip/discussion/45797/thread/e730c709/?limit=25&page=1#b240

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.