|Date: (C)2009-05-14 (M)2017-10-04|
|CVSS Score: 6.8||Access Vector: NETWORK|
|Exploitability Subscore: 8.6||Access Complexity: MEDIUM|
|Impact Subscore: 6.4||Authentication: NONE|
| ||Confidentiality: PARTIAL|
| ||Integrity: PARTIAL|
| ||Availability: PARTIAL|
The map_yp_alias function in functions/imap_general.php in SquirrelMail before 1.4.18 and NaSMail before 1.7 allows remote attackers to execute arbitrary commands via shell metacharacters in a username string that is used by the ypmatch program.