|Date: (C)2010-06-07 (M)2017-08-18|
|CVSS Score: 4.4||Access Vector: LOCAL|
|Exploitability Subscore: 3.4||Access Complexity: MEDIUM|
|Impact Subscore: 6.4||Authentication: NONE|
| ||Confidentiality: PARTIAL|
| ||Integrity: PARTIAL|
| ||Availability: PARTIAL|
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.