Vulnerability Name:

CCN-5896

Published:2001-01-01
Updated:2001-01-01
Summary:Many Unix systems may be vulnerable to a denial of service attack, due to a vulnerability in the tty utility. The tty utility is used to monitor and control users on a single system. When a user Telnets to a Unix system, the assigned tty becomes writable for any user on the system until the login is confirmed. A remote attacker could exploit this vulnerability by writing data to the tty while the user is logging in to block all users from establishing a telnet connection to the Unix system.
CVSS v3 Severity:4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Consequences:Denial of Service
References:Source: CCN
Type: BugTraq Mailing List, Mon Jan 01 2001 - 09:02:10 CST
Securax Advisory 13

Source: XF
Type: UNKNOWN
linux-tty-writable-dos(5896)

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/o:unix:unix:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    unix unix *