Vulnerability Name:

CVE-2017-9732 (CCN-153596)

Assigned:2017-06-16
Published:2018-11-28
Updated:2019-01-11
Summary:The read_packet function in knc (Kerberised NetCat) before 1.11-1 is vulnerable to denial of service (memory exhaustion) that can be exploited remotely without authentication, possibly affecting another services running on the targeted host.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C)
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): None
Integrity (I): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C)
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): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-400
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-9732

Source: MISC
Type: Exploit, Patch, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/150534/knc-Kerberized-NetCat-Denial-Of-Service.html

Source: FULLDISC
Type: Exploit, Mailing List, Patch, Third Party Advisory
20181130 CVE-2017-9732: knc (kerberized netcat) memory exhaustion

Source: XF
Type: UNKNOWN
knc-cve20179732-dos(153596)

Source: CCN
Type: knc GIT Repository
knc

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/elric1/knc/commit/f237f3e09ecbaf59c897f5046538a7b1a3fa40c1

Source: MISC
Type: Exploit, Patch, Third Party Advisory
https://github.com/irsl/knc-memory-exhaustion/

Source: CCN
Type: knc-memory-exhaustion GIT Repository
knc-memory-exhaustion

Source: CCN
Type: Packet Storm Security [11-29-2018]
knc (Kerberized NetCat) Denial Of Service

Source: CCN
Type: Full-Disclosure Mailing List, Wed, 28 Nov 2018 08:21:19 +0100
CVE-2017-9732: knc (kerberized netcat) memory exhaustion

Vulnerable Configuration:Configuration 1:
  • cpe:/a:secure-endpoints:kerberised_netcat:*:*:*:*:*:*:*:* (Version < 1.11-1)

  • * Denotes that component is vulnerable
    BACK
    secure-endpoints kerberised netcat *