Vulnerability identifier: #VU66

Vulnerability risk: High

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2016-3644

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Symantec Scan Engine
Other software / Other software solutions
Symantec Protection Engine (SPE)
Other software / Other software solutions
Symantec Protection for SharePoint Servers (SPSS)
Server applications / Other server solutions
Symantec Data Center Security:Server (SDCS:S)
Server applications / Other server solutions
Symantec Mail Security for Domino (SMSDOM)
Server applications / IDS/IPS systems, Firewalls and proxy servers
Symantec Mail Security for Microsoft Exchange (SMSMSE)
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Broadcom

Description
The vulnerability allows a remote attacker to cause heap overflow.

The vulnerability exists due to an error when Symantec attempts to clean or remove components from archives which are detected as malicious ones. The heap overflow occurs because Symantec assumes that filenames cannot be longer than 77 characters, which isn't correct.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Updates to resolve these issues can be installed using product update functionality. Users of Symantec Endpoint Protection (SEP), Symantec Protection Engine (SPE), Symantec Protection for SharePoint Servers (SPSS), Symantec Mail Security for Microsoft Exchange (SMSMSE) and Symantec Mail Security for Domino (SMSDOM) should apply custom patches. For more information, please refer to vendors advisory, specified in External links section.

Vulnerable software versions

Symantec Scan Engine: 13.1.2.19

Symantec Protection for SharePoint Servers (SPSS): 6.0.3

Symantec Mail Security for Domino (SMSDOM): 8.0.9 - 8.1.3

Symantec Mail Security for Microsoft Exchange (SMSMSE): 6.5.8 - 7.5.4

Symantec Protection Engine (SPE): 7.0.5 - 7.8.0

:

Symantec Data Center Security:Server (SDCS:S): 6.0 - 6.6MP1

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External links
http://bugs.chromium.org/p/project-zero/issues/detail?id=818&q=label%3AVendor-Symantec

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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, proof of concept for this vulnerability is available.