AVG AntiVirus for MacOS with scan engine before 4668 might allow remote attackers to bypass malware detection by leveraging failure to scan inside disk image (aka DMG) files.

Code injection vulnerability in AVG Ultimate 17.1 (and earlier), AVG Internet Security 17.1 (and earlier), and AVG AntiVirus FREE 17.1 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any AVG process via a "DoubleAgent" attack. One perspective on this issue is that (1) these products do not use the Protected Processes feature, and therefore an attacker can enter an arbitrary Application Verifier Provider DLL under Image File Execution Options in the registry; (2) the self-protection mechanism is intended to block all local processes (regardless of privileges) from modifying Image File Execution Options for these products; and (3) this mechanism can be bypassed by an attacker who temporarily renames Image File Execution Options during the attack.

A local denial of service vulnerability exists in window broadcast message handling functionality of Kaspersky Anti-Virus software. Sending certain unhandled window messages, an attacker can cause application termination and in the same way bypass KAV self-protection mechanism.

The kernel component in Symantec Anti-Virus Engine (AVE) 20151.1 before 20151.1.1.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory access violation and system crash) via a malformed PE header file.

K7Sentry.sys in K7 Computing Ultimate Security, Anti-Virus Plus, and Total Security before 14.2.0.253 allows local users to write to arbitrary memory locations, and consequently gain privileges, via a crafted 0x95002570, 0x95002574, 0x95002580, 0x950025a8, 0x950025ac, or 0x950025c8 IOCTL call.

Multiple cross-site scripting (XSS) vulnerabilities in the web UI in Sophos Anti-Virus for Linux before 9.6.1 allow local users to inject arbitrary web script or HTML via the (1) newListList:ExcludeFileOnExpression, (2) newListList:ExcludeFilesystems, or (3) newListList:ExcludeMountPaths parameter to exclusion/configure or (4) text:EmailServer or (5) newListList:Email parameter to notification/configure.

F-Secure Anti-Virus, Safe Anywhere, and PSB Workstation Security before 11500 for Mac OS X allows local users to disable the Mac OS X firewall via unspecified vectors.

SQL injection vulnerability in an unspecified DLL in the FSDBCom ActiveX control in F-Secure Anti-Virus for Microsoft Exchange Server before HF02, Anti-Virus for Windows Servers 9.00 before HF09, Anti-Virus for Citrix Servers 9.00 before HF09, and F-Secure Email and Server Security and F-Secure Server Security 9.20 before HF01 allows remote attackers to execute arbitrary SQL commands via unknown vectors, related to GetCommand.

Sophos Anti-Virus engine (SAVi) before 3.50.1, as used in VDL 4.97G 9.7.x before 9.7.9, 10.0.x before 10.0.11, and 10.3.x before 10.3.1 does not set an ACL for certain global and session objects, which allows local users to bypass anti-virus protection, cause a denial of service (resource consumption, CPU consumption, and eventual crash) or spoof "ready for update" messages by performing certain operations on mutexes or events including (1) DataUpdateRequest, (2) MmfMutexSAV-****, (3) MmfMutexSAV-Info, (4) ReadyForUpdateSAV-****, (5) ReadyForUpdateSAV-Info, (6) SAV-****, (7) SAV-Info, (8) StateChange, (9) SuspendedSAV-****, (10) SuspendedSAV-Info, (11) UpdateComplete, (12) UpdateMutex, (13) UpdateRequest, or (14) SophosALMonSessionInstance, as demonstrated by triggering a ReadyForUpdateSAV event and modifying the UpdateComplete, UpdateMutex, and UpdateRequest objects.

AVG Anti-Virus does not properly interact with the processing of hcp:// URLs by the Microsoft Help and Support Center, which makes it easier for remote attackers to execute arbitrary code via malware that is correctly detected by this product, but with a detection approach that occurs too late to stop the code execution.