Symantec Brightmail AntiSpam (SBAS) before 6.0.4, when the Control Center is allowed to connect from any computer, allows remote attackers to cause a denial of service (application freeze) "by sending invalid posts".

The SYMDNS.SYS driver in Symantec Norton Internet Security and Professional 2002 through 2004, Norton Personal Firewall 2002 through 2004, Norton AntiSpam 2004, Client Firewall 5.01 and 5.1.1, and Client Security 1.0 through 2.0 allows remote attackers to cause a denial of service (CPU consumption from infinite loop) via a DNS response with a compressed name pointer that points to itself.

Buffer overflow in the POP server POProxy for the Norton Anti-Virus protection NAV2000 program via a large USER command.

PCAnywhere allows remote attackers to cause a denial of service by terminating the connection before PCAnywhere provides a login prompt.

Multiple vulnerabilities in SYMDNS.SYS for Symantec Norton Internet Security and Professional 2002 through 2004, Norton Personal Firewall 2002 through 2004, Norton AntiSpam 2004, Client Firewall 5.01 and 5.1.1, and Client Security 1.0 through 2.0 allow remote attackers to cause a denial of service or execute arbitrary code via (1) a manipulated length byte in the first-level decoding routine for NetBIOS Name Service (NBNS) that modifies an index variable and leads to a stack-based buffer overflow, (2) a heap-based corruption problem in an NBNS response that is missing certain RR fields, and (3) a stack-based buffer overflow in the DNS component via a Resource Record (RR) with a long canonical name (CNAME) field composed of many smaller components.

Norton Internet Security 2001 opens log files with FILE_SHARE_READ and FILE_SHARE_WRITE permissions, which could allow remote attackers to modify the log file contents while Norton Internet Security is running.

Norton AntiVirus for Internet Email Gateways (NAVIEG) 1.0.1.7 and earlier, and Norton AntiVirus for MS Exchange (NAVMSE) 1.5 and earlier, store the administrator password in cleartext in (1) the navieg.ini file for NAVIEG, and (2) the ModifyPassword registry key in NAVMSE.

SYMNDIS.SYS in Symantec Norton Internet Security 2003 and 2004, Norton Personal Firewall 2003 and 2004, Client Firewall 5.01 and 5.1.1, and Client Security 1.0 and 1.1 allow remote attackers to cause a denial of service (infinite loop) via a TCP packet with (1) SACK option or (2) Alternate Checksum Data option followed by a length of zero.

Component Object Model (COM) Hijacking in Symantec Endpoint Protection Windows Client

Symantec Endpoint Protection, prior to 14.3 RU10 Patch 1, RU9 Patch 2, and RU8 Patch 3, may be susceptible to a COM Hijacking vulnerability, which is a type of issue whereby an attacker attempts to establish persistence and evade detection by hijacking COM references in the Windows Registry.

Elevation of Privileges in Symantec Endpoint Protection Windows Client

Symantec Endpoint Protection, prior to 14.3 RU10 Patch 1, RU9 Patch 2, and RU8 Patch 3, may be susceptible to a Elevation of Privilege vulnerability, which is a type of issue whereby an attacker may attempt to compromise the software application to gain elevated access to resources that are normally protected from an application or user.

Elevation of Privileges in Web Security Services (WSS) Agent

WSS Agent, prior to 9.8.5, may be susceptible to a Elevation of Privilege vulnerability, which is a type of issue whereby an attacker may attempt to compromise the software application to gain elevated access to resources that are normally protected from an application or user.

Symantec Endpoint Detection and Response (SEDR) Appliance, prior to 4.7.0, may be susceptible to a privilege escalation vulnerability, which is a type of issue whereby an attacker may attempt to compromise the software application to gain elevated access to resources that are normally protected from an application or user.

An authenticated user can embed malicious content with XSS into the admin group policy page.

An authenticated user who has the privilege to add/edit annotations on the Content tab, can craft a malicious annotation that can be executed on the annotations page (Annotation Text Column).

A denial of service (DoS) attack in Symantec Endpoint Encryption before SEE 11.1.3HF2 allows remote attackers to make a particular machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a specific host within a network.

A denial of service (DoS) attack in Symantec Encryption Desktop before SED 10.4.1 MP2HF1 allows remote attackers to make a particular machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a specific host within a network.

Symantec ProxyClient 3.4 for Windows is susceptible to a privilege escalation vulnerability. A malicious local Windows user can, under certain circumstances, exploit this vulnerability to escalate their privileges on the system and execute arbitrary code with LocalSystem privileges.

Prior to SEP 12.1 RU6 MP9 & SEP 14 RU1 Symantec Endpoint Protection Windows endpoint can encounter a situation whereby an attacker could use the product's UI to perform unauthorized file deletes on the resident file system.

Symantec Endpoint Protection prior to SEP 12.1 RU6 MP9 could be susceptible to a privilege escalation vulnerability, which is a type of issue that allows a user to gain elevated access to resources that are normally protected at lower access levels. In the circumstances of this issue, the capability of exploit is limited by the need to perform multiple file and directory writes to the local filesystem and as such, is not feasible in a standard drive-by type attack.

The Symantec Content Analysis (CA) 1.3, 2.x prior to 2.2.1.1, and Mail Threat Defense (MTD) 1.1 management consoles are susceptible to a cross-site request forging (CSRF) vulnerability. A remote attacker can use phishing or other social engineering techniques to access the management console with the privileges of an authenticated administrator user.