FreeBSD 3.3 xterm/seyon-emu PATH privileges management

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD 3.3 and classified as problematic. This affects an unknown function of the file xterm/seyon-emu. The manipulation of the argument PATH as part of Environment Variable results in privileges management. This vulnerability is reported as CVE-1999-0820. Moreover, an exploit is present. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in FreeBSD 3.3 (Operating System). Affected is an unknown code of the file xterm/seyon-emu. The manipulation of the argument PATH as part of a Environment Variable leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

FreeBSD seyon allows users to gain privileges via a modified PATH variable for finding the xterm and seyon-emu commands.

The weakness was disclosed 12/01/1999 by Brock Tellier (FIRST) (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-1999-0820. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

After even before and not, there has been an exploit disclosed. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 23 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (3483), Exploit-DB (19609), SecurityFocus (BID 838†) and OSVDB (5996†). The entry VDB-14954 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
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: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/08/1999 🔍
12/01/1999 +23 days 🔍
12/01/1999 +0 days 🔍
12/01/1999 +0 days 🔍
02/21/2003 +1178 days 🔍
06/22/2014 +4138 days 🔍
07/31/2024 +3692 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: securityfocus.com⛔
Researcher: Brock Tellier (FIRST)
Status: Not defined

CVE: CVE-1999-0820 (🔍)
GCVE (CVE): GCVE-0-1999-0820
GCVE (VulDB): GCVE-100-15012
X-Force: 3483
SecurityFocus: 838 - FreeBSD Seyon setgid dialer Vulnerability
OSVDB: 5996 - FreeBSD seyon PATH Variable Subversion Local Privilege Escalation

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

Entryinfo

Created: 06/22/2014 15:16
Updated: 07/31/2024 16:09
Changes: 06/22/2014 15:16 (58), 05/22/2018 09:13 (4), 07/31/2024 16:09 (25)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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