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CVSS: 6.1EPSS: 0%CPEs: 1EXPL: 0

29 Jul 2024 — Avast Free Antivirus Link Following Denial-of-Service Vulnerability. This vulnerability allows local attackers to create a denial-of-service condition on affected installations of Avast Free Antivirus. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the Avast Service. By creating a symbolic link, an attacker can abuse the service to create a folder. • https://www.zerodayinitiative.com/advisories/ZDI-24-999 • CWE-59: Improper Link Resolution Before File Access ('Link Following') •

CVSS: 7.3EPSS: 0%CPEs: 2EXPL: 0

10 Jun 2024 — A sym-linked file accessed via the repair function in Avast Antivirus <24.2 on Windows may allow user to elevate privilege to delete arbitrary files or run processes as NT AUTHORITY\SYSTEM. The vulnerability exists within the "Repair" (settings -> troubleshooting -> repair) feature, which attempts to delete a file in the current user's AppData directory as NT AUTHORITY\SYSTEM. A low-privileged user can make a pseudo-symlink and a junction folder and point to a file on the system. This can provide a low-priv... • https://support.norton.com/sp/static/external/tools/security-advisories.html • CWE-59: Improper Link Resolution Before File Access ('Link Following') CWE-1284: Improper Validation of Specified Quantity in Input •

CVSS: 8.2EPSS: 0%CPEs: 1EXPL: 0

08 Nov 2023 — A time-of-check to time-of-use (TOCTOU) bug in handling of IOCTL (input/output control) requests. This TOCTOU bug leads to an out-of-bounds write vulnerability which can be further exploited, allowing an attacker to gain full local privilege escalation on the system.This issue affects Avast/Avg Antivirus: 23.8. Un error de tiempo de verificación a tiempo de uso (TOCTOU) en el manejo de solicitudes IOCTL (control de entrada/salida). Este error de TOCTOU conduce a una vulnerabilidad de escritura fuera de los ... • https://support.norton.com/sp/static/external/tools/security-advisories.html • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition •

CVSS: 5.3EPSS: 0%CPEs: 1EXPL: 0

27 Sep 2023 — Avast Premium Security Sandbox Protection Incorrect Authorization Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Avast Premium Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the implementation of the sandbox feature. The issue results from incorrect authorization. • https://www.zerodayinitiative.com/advisories/ZDI-23-1474 • CWE-863: Incorrect Authorization •

CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0

27 Sep 2023 — Avast Premium Security Sandbox Protection Link Following Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Avast Premium Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the implementation of the sandbox feature. By creating a symbolic link, an attacker can abuse the service to create arbitrary namespace... • https://www.zerodayinitiative.com/advisories/ZDI-23-1475 • CWE-706: Use of Incorrectly-Resolved Name or Reference •

CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0

11 Jul 2023 — Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver. • http://avast.com • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •

CVSS: 5.8EPSS: 0%CPEs: 3EXPL: 0

19 Apr 2023 — Avast and AVG Antivirus for Windows were susceptible to a NULL pointer dereference issue via RPC-interface. The issue was fixed with Avast and AVG Antivirus version 22.11 • https://support.norton.com/sp/static/external/tools/security-advisories.html • CWE-476: NULL Pointer Dereference •

CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0

19 Apr 2023 — Avast and AVG Antivirus for Windows were susceptible to a Time-of-check/Time-of-use (TOCTOU) vulnerability in the restore process leading to arbitrary file creation. The issue was fixed with Avast and AVG Antivirus version 22.11 • https://support.norton.com/sp/static/external/tools/security-advisories.html • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition •

CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0

19 Apr 2023 — Avast and AVG Antivirus for Windows were susceptible to a Time-of-check/Time-of-use (TOCTOU) vulnerability in the Quarantine process, leading to arbitrary file/directory deletion. The issue was fixed with Avast and AVG Antivirus version 22.11 and virus definitions from 14 February 2023 or later. • https://support.norton.com/sp/static/external/tools/security-advisories.html • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition •

CVSS: 7.8EPSS: 0%CPEs: 5EXPL: 0

10 Jan 2023 — Norton, Avira, Avast and AVG Antivirus for Windows 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. • https://support.norton.com/sp/static/external/tools/security-advisories.html • CWE-269: Improper Privilege Management •