Red Hat Linux 5.0/5.1/5.2 Talkd format string

CVSS Meta Temp Score
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Red Hat Linux 5.0/5.1/5.2. This issue affects some unknown processing of the component Talkd. The manipulation leads to format string. This vulnerability is documented as CVE-2000-1010. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Red Hat Linux 5.0/5.1/5.2 (Operating System). This issue affects an unknown functionality of the component Talkd. The manipulation with an unknown input 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:

Format string vulnerability in talkd in OpenBSD and possibly other BSD-based OSes allows remote attackers to execute arbitrary commands via a user name that contains format characters.

The issue has been introduced in 12/01/1997. The weakness was released 12/11/2000 by Chris Evans as not defined posting (Bugtraq). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2000-1010. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2025).

The vulnerability was handled as a non-public zero-day exploit for at least 1106 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 12970 (Solaris 2.6 (sparc) : 112814-01), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Solaris Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38393 (Sun Solaris in.talkd Format String Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5344), Tenable (12970), SecurityFocus (BID 1764†) and Vulnerability Center (SBV-7535†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
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: Format string
CWE: CWE-134 / CWE-119
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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Nessus ID: 12970
Nessus Name: Solaris 2.6 (sparc) : 112814-01
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/01/1997 🔍
10/05/2000 +1039 days 🔍
12/11/2000 +67 days 🔍
12/11/2000 +0 days 🔍
12/11/2000 +0 days 🔍
04/11/2005 +1582 days 🔍
06/30/2014 +3367 days 🔍
10/12/2025 +4121 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: securityfocus.com⛔
Researcher: Chris Evans
Status: Confirmed

CVE: CVE-2000-1010 (🔍)
GCVE (CVE): GCVE-0-2000-1010
GCVE (VulDB): GCVE-100-16031
X-Force: 5344
SecurityFocus: 1764 - BSD talkd Remote Format String Vulnerability
Vulnerability Center: 7535 - Buffer Overflow in talkd via User Name Parameter, Critical

Entryinfo

Created: 06/30/2014 16:28
Updated: 10/12/2025 00:30
Changes: 06/30/2014 16:28 (61), 04/13/2017 12:27 (5), 06/25/2021 09:20 (3), 10/12/2025 00:30 (18)
Complete: 🔍
Cache ID: 216::103

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