Quantum Secular Labs / Blog / Advisories

CVE-2016-3645: Symantec Norton Security: Buffer overflow

CVE-2016-3645 is rated critical with a CVSS v3.0 base score of 9.8 and affects Symantec Norton Security, along with 1 other product in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Integer overflow in the TNEF unpacker in the AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoint Protection (SEP) for Mac; Symantec Endpoint Protection (SEP) for Linux before 12.1 RU6 MP5; Symantec Protection Engine (SPE) before 7.0.5 HF01, 7.5.x before 7.5.3 HF03, 7.5.4 before HF01, and 7.8.0 before HF01; Symantec Protection for SharePoint Servers (SPSS) 6.0.3 through 6.0.5 before 6.0.5 HF 1.5 and 6.0.6 before HF 1.6; Symantec Mail Security for Microsoft Exchange (SMSMSE) before 7.0_3966002 HF1.1 and 7.5.x before 7.5_3966008 VHF1.2; Symantec Mail Security for Domino (SMSDOM) before 8.0.9 HF1.1 and 8.1.x before 8.1.3 HF1.2; CSAPI before 10.0.4 HF01; Symantec Message Gateway (SMG) before 10.6.1-4; Symantec Message Gateway for Service Providers (SMG-SP) 10.5 before patch 254 and 10.6 before patch 253; Norton AntiVirus, Norton Security, Norton Internet Security, and Norton 360 before NGC 22.7; Norton Security for Mac before 13.0.2; Norton Power Eraser (NPE) before 5.1; and Norton Bootable Removal Tool (NBRT) before 2016.1 allows remote attackers to have an unspecified impact via crafted TNEF data.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Affected products

  • Symantec Norton Security: up to and including 13.0.1; all versions listed by NVD
  • Symantec Protection Engine: from 7.0.0 up to and including 7.0.5; from 7.5.0 up to and including 7.5.4; 7.8.0
  • Symantec Advanced Threat Protection: up to and including 2.0.3
  • Symantec Norton Bootable Removal Tool: up to and including 2016.0
  • Symantec Data Center Security Server: 6.0; 6.0 mp1; 6.5; 6.5 mp1; 6.6; 6.6 mp1
  • Symantec Protection For Sharepoint Servers: from 6.0 up to and including 6.0.6; from 6.03 up to and including 6.05
  • Symantec Message Gateway For Service Providers: 10.5; 10.6
  • Symantec Csapi: up to and including 10.0.4
  • Symantec Endpoint Protection: 12.1.6; 12.1.6 mp1; 12.1.6 mp2; 12.1.6 mp3; 12.1.6 mp4
  • Symantec Norton Power Eraser: up to and including 5.0
  • Symantec Mail Security For Domino: from 8.0 up to and including 8.0.9; from 8.1 up to and including 8.1.3
  • Symantec Mail Security For Microsoft Exchange: from 7.0 up to and including 7.0.4; from 7.5 up to and including 7.5.4; 6.5.8
  • Symantec Message Gateway: up to and including 10.6.1-3
  • Symantec Norton 360: all versions listed by NVD
  • Symantec Norton Antivirus: all versions listed by NVD

References