VAR-201710-0073

Vulnerability from variot - Updated: 2023-12-18 12:44

A Cross-site Request Forgery issue was discovered in JanTek JTC-200, all versions. An attacker could perform actions with the same permissions as a victim user, provided the victim has an active session and is induced to trigger the malicious request. JanTek JTC-200 Contains a cross-site request forgery vulnerability.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. The JanTekJTC-200 is a TCP/IP converter (serial server) from JanTek Technology. A remote attacker could exploit the vulnerability to perform unauthorized operations as a user. This may aid in further attacks. Vendor: JanTek Equipment: JTC-200 Vulnerabilities: Cross-site Request Forgery, Improper Authentication

Advisory URL: https://ipositivesecurity.com/2017/10/28/ics-jantek-jtc-200-rs232-net-converter-advisory-published/

ICS-CERT Advisory https://ics-cert.us-cert.gov/advisories/ICSA-17-283-02

CVE-ID CVE-2016-5789 CVE-2016-5791

Detailed Proof of Concept: https://ipositivesecurity.com/2016/07/05/rs232-net-converter-model-jtc-200-multiple-vulnerabilities/


AFFECTED PRODUCTS

The following versions of JTC-200, a TCP/IP converter, are affected: JTC-200 all versions.


BACKGROUND

Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Europe and Asia Company Headquarters Location: Taiwan


IMPACT

Successful exploitation of these vulnerabilities allow for remote code execution on the device with elevated privileges. A CVSS v3 base score of 8.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

IMPROPER AUTHENTICATION CWE-287 The improper authentication could provide undocumented Busybox Linux shell accessible over Telnet service without any authentication. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).


Trying IP... Connected to IP. Escape character is '^]'. BusyBox v0.60.4 (2008.02.21-16:59+0000) Built-in shell (msh) Enter 'help' for a list of built-in commands.

BusyBox v0.60.4 (2008.02.21-16:59+0000) multi-call binary Usage: busybox [function] [arguments]... or: [function] [arguments]... BusyBox is a multi-call binary that combines many common Unix utilities into a single executable. Most people will create a link to busybox for each function they wish to use, and BusyBox will act like whatever it was invoked as. Currently defined functions: [, busybox, cat, cp, df, hostname, ifconfig, init, kill, killall, ls, mkdir, mknod, mount, msh, mv, ping, ps, pwd, rm, sh, test, touch, vi

ls

bin dev etc nfs proc swap usb var

cd etc

ls

ConfigPage WRConfig.ini config inetd.conf inittab ppp protocols rc resolv.conf services

cat inetd.conf

telnet stream tcpnowait root /bin/telnetd



Technical Details

https://ipositivesecurity.com/2016/07/05/rs232-net-converter-model-jtc-200-multiple-vulnerabilities/

+++++ Best Regards, Karn Ganeshen

Show details on source website

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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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