Vulnerability identifier: #VU7879

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11696

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Mozilla NSS
Universal components / Libraries / Libraries used by multiple products

Vendor: Mozilla

Description
The vulnerability allows a local attacker to gain elevated privileges.

The weakness exists due to heap-based buffer overflow in __hash_open() in 'lib/dbm/src/hash.c'. A local attacker supply a specially crafted 'cert8.db' file, cause is to be processed by the NSS 'certutil' application and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Mozilla NSS: 3.24 - 3.30.2

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External links
http://www.geeknik.net/9brdqk6xu

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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.

Is there known malware, which exploits this vulnerability?

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