CWE Code: 362
Vulnerability Type: privilege_escalation
CVSS Score: 4.4
CWE Name:  Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Summary: transports/appendfile.c in exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.
Access Authentication: NONE
Access Complexity: MEDIUM
Access Vector: LOCAL
Impact (C/I/A): PARTIAL/PARTIAL/PARTIAL
Published Date: 2010-06-07
Last Modified Date: 2018-10-10