SGI IRIX up to 6.5.8 Telnet Daemon IAC-SB-TELOPT_ENVIRON format string

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in SGI IRIX up to 6.5.8. This affects an unknown part of the component Telnet Daemon. The manipulation of the argument IAC-SB-TELOPT_ENVIRON as part of Environment Variable leads to format string. This vulnerability is referenced as CVE-2000-0733. Furthermore, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in SGI IRIX up to 6.5.8 (Operating System). It has been rated as critical. This issue affects some unknown processing of the component Telnet Daemon. The manipulation of the argument IAC-SB-TELOPT_ENVIRON as part of a Environment Variable leads to a format string vulnerability. Using CWE to declare the problem leads to CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Telnetd telnet server in IRIX 5.2 through 6.1 does not properly cleans user-injected format strings, which allows remote attackers to execute arbitrary commands via a long RLD variable in the IAC-SB-TELOPT_ENVIRON request.

The weakness was published 10/20/2000 as not defined posting (Bugtraq). It is possible to read the advisory at archives.neohapsis.com. The identification of this vulnerability is CVE-2000-0733. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38127 (IRIX telnetd Environment Variable Format String Vulnerability).

Upgrading eliminates this vulnerability. Attack attempts may be identified with Snort ID 711. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 793.

The vulnerability is also documented in the databases at X-Force (5092), Exploit-DB (20149), SecurityFocus (BID 1572†) and Vulnerability Center (SBV-849†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Snort ID: 711
Snort Message: PROTOCOL-TELNET SGI telnetd format bug
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

08/14/2000 🔍
10/20/2000 +67 days 🔍
10/20/2000 +0 days 🔍
10/20/2000 +0 days 🔍
02/09/2003 +842 days 🔍
06/27/2014 +4156 days 🔍
10/12/2025 +4125 days 🔍

Sourcesinfo

Vendor: sgi.com

Advisory: archives.neohapsis.com
Status: Confirmed

CVE: CVE-2000-0733 (🔍)
GCVE (CVE): GCVE-0-2000-0733
GCVE (VulDB): GCVE-100-15875
X-Force: 5092
SecurityFocus: 1572 - IRIX telnetd Environment Variable Format String Vulnerability
Vulnerability Center: 849 - IRIX telnetd Environment Variable Format String Vulnerability, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/27/2014 15:09
Updated: 10/12/2025 20:52
Changes: 06/27/2014 15:09 (68), 05/09/2019 07:37 (5), 10/19/2024 11:06 (17), 10/12/2025 20:52 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!