VDB-14786 · CVE-1999-0740 · BID 594

Red Hat Linux 4.2/5.2/6.0 in.telnetd denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Red Hat Linux 4.2/5.2/6.0. This affects an unknown part of the file in.telnetd. Such manipulation leads to denial of service. This vulnerability is documented as CVE-1999-0740. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Red Hat Linux 4.2/5.2/6.0 (Operating System). It has been rated as critical. Affected by this issue is some unknown functionality of the file in.telnetd. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is confidentiality, and availability. CVE summarizes:

Remote attackers can cause a denial of service on Linux in.telnetd telnet daemon through a malformed TERM environmental variable.

The issue has been introduced in 05/19/1997. The weakness was released 08/19/1999 by FIRST with Redhat (Website). The advisory is available at securityfocus.com. This vulnerability is handled as CVE-1999-0740. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 822 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 594†). Entries connected to this vulnerability are available at VDB-14788 and VDB-14784. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/19/1997 🔍
08/19/1999 +822 days 🔍
08/19/1999 +0 days 🔍
08/19/1999 +0 days 🔍
06/21/2014 +5420 days 🔍
04/19/2026 +4320 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: securityfocus.com⛔
Researcher: FIRST
Organization: Redhat
Status: Confirmed

CVE: CVE-1999-0740 (🔍)
GCVE (CVE): GCVE-0-1999-0740
GCVE (VulDB): GCVE-100-14786
SecurityFocus: 594 - Linux in.telnetd Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 06/21/2014 21:20
Updated: 04/19/2026 10:50
Changes: 06/21/2014 21:20 (51), 04/14/2019 22:20 (5), 04/19/2026 10:50 (18)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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