#VU6778 Use-after-free error in Backup Exec - CVE-2017-8895

Vulnerability identifier: #VU6778

Vulnerability risk: High

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2017-8895

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Backup Exec
Client/Desktop applications / Multimedia software

Vendor: Veritas Technologies

Description
The vulnerability allows a remote user to execute arbitrary code on the target system.

The weakness exists due to use-after-free error when handling malicious data. A remote attacker can send specially crafted NDMP data over SSL to TCP port 10000, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 2014 14.1.1187.1126, 15 14.2.1180.3160, 16 FP1 (16.0.1142.1327).

Vulnerable software versions

Backup Exec: 14.1 - 2014 SP2

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External links
https://www.veritas.com/content/support/en_US/security/VTS17-006.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.