Vulnerability Name:

CVE-1999-1257 (CCN-1825)

Assigned:1997-11-26
Published:1997-11-26
Updated:2017-12-19
Summary:Xyplex terminal server 6.0.1S1, and possibly other versions, allows remote attackers to bypass the password prompt by entering (1) a CTRL-Z character, or (2) a ? (question mark).
CVSS v3 Severity:7.3 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-Other
Vulnerability Consequences:Gain Access
References:Source: CCN
Type: BugTraq Mailing List, Wed, 26 Nov 1997 21:30:16 -0500
Xyplex terminal server bug

Source: MITRE
Type: CNA
CVE-1999-1257

Source: CCN
Type: iTouch Communications Web site
Welcome to iTouch Communications

Source: BUGTRAQ
Type: Vendor Advisory
19971126 Xyplex terminal server bug

Source: XF
Type: UNKNOWN
xyplex-controlz-login(1825)

Source: XF
Type: UNKNOWN
xyplex-controlz-login(1825)

Source: XF
Type: UNKNOWN
xyplex-question-login(1826)

Vulnerable Configuration:Configuration 1:
  • cpe:/h:xyplex:maxserver_xyplex_terminal_server:6.0.1_s1:*:*:*:*:*:*:*
  • OR cpe:/h:xyplex:maxserver_xyplex_terminal_server:*:*:*:*:*:*:*:* (Version <= 6.0.2_s4)

  • * Denotes that component is vulnerable
    Vulnerability Name:

    CVE-1999-1257 (CCN-1826)

    Assigned:1997-12-01
    Published:1997-12-01
    Updated:1997-12-01
    Summary:iTouch Communications (formerly Xyplex) terminal servers could allow users to bypass normal authentication by entering a question mark ('?') at the username prompt.
    CVSS v3 Severity:7.3 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
    Exploitability Metrics:Attack Vector (AV): Network
    Attack Complexity (AC): Low
    Privileges Required (PR): None
    User Interaction (UI): None
    Scope:Scope (S): Unchanged
    Impact Metrics:Confidentiality (C): Low
    Integrity (I): Low
    Availibility (A): Low
    CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Exploitability Metrics:Access Vector (AV): Network
    Access Complexity (AC): Low
    Authentication (Au): None
    Impact Metrics:Confidentiality (C): Partial
    Integrity (I): Partial
    Availibility (A): Partial
    7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Exploitability Metrics:Access Vector (AV): Network
    Access Complexity (AC): Low
    Athentication (Au): None
    Impact Metrics:Confidentiality (C): Partial
    Integrity (I): Partial
    Availibility (A): Partial
    Vulnerability Consequences:Gain Access
    References:Source: CCN
    Type: BugTraq Mailing List, Mon, 1 Dec 1997 21:50:18 -0800
    Re: Xyplex terminal server bug

    Source: MITRE
    Type: CNA
    CVE-1999-1257

    Source: CCN
    Type: iTouch Communications Web site
    Welcome to iTouch Communications

    Source: XF
    Type: UNKNOWN
    xyplex-question-login(1826)

    BACK
    xyplex maxserver xyplex terminal server 6.0.1_s1
    xyplex maxserver xyplex terminal server *