CyberSecBulletin

Improper Link Resolution Before File Access

CWE-59

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

We track 491 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.0. 25 have been exploited in real attacks.

How this weakness is prevented

  • Architecture and Design: Follow the principle of least privilege when assigning access rights to entities in a software system. Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Latest Improper Link Resolution Before File Access vulnerabilities

  • 7.8 High severity

    Microsoft Update Notification Manager Privilege Escalation Exploited

    CVE-2020-0638MicrosoftEPSS 2.54%

    An elevation of privilege vulnerability exists in the way the Update Notification Manager handles files.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Update Notification Manager Elevation of Privilege

  • 7.8 High severity

    Microsoft Windows AppX Deployment Extensions Privilege Escalation Exploited

    CVE-2019-1385MicrosoftEPSS 3.6%

    An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.To exploit this vulnerability, an authenticated attacker would need to run a specially craf

  • 7.8 High severity

    Microsoft Windows Error Reporting Manager Privilege Escalation Exploited

    CVE-2019-1315MicrosoftEPSS 3.48%

    An elevation of privilege vulnerability exists when Windows Error Reporting manager improperly handles hard links, aka 'Windows Error Reporting Manager Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1339, CVE-2019-1342.

  • 7.8 High severity

    Microsoft Windows AppX Deployment Server Privilege Escalation Exploited

    CVE-2019-1253MicrosoftEPSS 11.6%

    An elevation of privilege vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows Elevation of Privilege Vulnerab

  • 7.8 High severity

    Microsoft Windows AppX Deployment Service Privilege Escalation Exploited

    CVE-2019-1130MicrosoftEPSS 1.72%

    An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1129.

  • 7.8 High severity

    Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Exploited

    CVE-2019-1129MicrosoftEPSS 1.78%

    An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1130.

  • 7.8 High severity

    Microsoft Task Scheduler Privilege Escalation Exploited

    CVE-2019-1069MicrosoftEPSS 6.17%

    An elevation of privilege vulnerability exists in the way the Task Scheduler Service validates certain file operations. An attacker who successfully exploited the vulnerability could gain elevated privileges on a victim system. To exploit the vulnerability, an

  • 7.8 High severity

    Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Exploited

    CVE-2019-1064MicrosoftEPSS 6.89%

    An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install pr

  • 7.8 High severity

    Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Exploited

    CVE-2019-0841MicrosoftEPSS 41.4%

    An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0730, CVE-2019-0731, CVE-2019-0796, CVE-2019-08

  • 7.8 High severity

    Red Hat Automatic Bug Reporting Tool Privilege Escalation Exploited

    CVE-2015-5287Red HatEPSS 5%

    The abrt-hook-ccpp help program in Automatic Bug Reporting Tool (ABRT) before 2.7.1 allows local users with certain permissions to gain privileges via a symlink attack on a file with a predictable name, as demonstrated by /var/tmp/abrt/abrt-hax-coredump or /va

  • 7.8 High severity

    Apple OS X Authentication Bypass Exploited

    CVE-2015-1130AppleEPSS 9.89%

    The XPC implementation in Admin Framework in Apple OS X before 10.10.3 allows local users to bypass authentication and obtain admin privileges via unspecified vectors.