CVE-2007-0956

Unauthorized access via krb5-telnet daemon

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username beginning with a '-' character, a similar issue to CVE-2007-0882.

El demonio telnet (telnetd) en MIT krb5 anterior a 1.6.1 permite a atacantes remotos evitar la validación y ganar accesos al sistema a través de un nombre de usuario comenzando con el carácter '-', un asunto similar a CVE-2007-0882.

A vulnerability was found in the username handling of the MIT krb5 telnet daemon. A remote attacker that could access the telnet port of a target machine could login as root without requiring a password. Buffer overflows in the kadmin server daemon were discovered that could be exploited by a remote attacker able to access the KDC. Successful exploitation could allow for the execution of arbitrary code with the privileges of the KDC or kadmin server processes. Finally, a double-free flaw was discovered in the GSSAPI library used by the kadmin server daemon, which could lead to a denial of service condition or the execution of arbitrary code with the privileges of the KDC or kadmin server processes.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2007-02-14 CVE Reserved
2007-04-05 CVE Published
2024-08-07 CVE Updated
2025-06-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-306: Missing Authentication for Critical Function

CAPEC

References (32)

URL	Tag	Source
http://secunia.com/advisories/24706	Third Party Advisory
http://secunia.com/advisories/24735	Third Party Advisory
http://secunia.com/advisories/24736	Third Party Advisory
http://secunia.com/advisories/24740	Third Party Advisory
http://secunia.com/advisories/24750	Third Party Advisory
http://secunia.com/advisories/24755	Third Party Advisory
http://secunia.com/advisories/24757	Third Party Advisory
http://secunia.com/advisories/24785	Third Party Advisory
http://secunia.com/advisories/24786	Third Party Advisory
http://secunia.com/advisories/24817	Third Party Advisory
http://www.kb.cert.org/vuls/id/220816	Third Party Advisory
http://www.securityfocus.com/archive/1/464590/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/464666/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/464814/30/7170/threaded	Mailing List
http://www.securityfocus.com/bid/23281	Third Party Advisory
http://www.securitytracker.com/id?1017848	Third Party Advisory
http://www.us-cert.gov/cas/techalerts/TA07-093B.html	Third Party Advisory
http://www.vupen.com/english/advisories/2007/1218	Third Party Advisory
http://www.vupen.com/english/advisories/2007/1249	Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/33414	Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10046	Broken Link

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
ftp://patches.sgi.com/support/free/security/advisories/20070401-01-P.asc	2021-02-02
http://lists.suse.com/archive/suse-security-announce/2007-Apr/0001.html	2021-02-02
http://security.gentoo.org/glsa/glsa-200704-02.xml	2021-02-02
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102867-1	2021-02-02
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-001-telnetd.txt	2021-02-02
http://www.debian.org/security/2007/dsa-1276	2021-02-02
http://www.mandriva.com/security/advisories?name=MDKSA-2007:077	2021-02-02
http://www.redhat.com/support/errata/RHSA-2007-0095.html	2021-02-02
http://www.ubuntu.com/usn/usn-449-1	2021-02-02
https://access.redhat.com/security/cve/CVE-2007-0956	2007-04-03
https://bugzilla.redhat.com/show_bug.cgi?id=229782	2007-04-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				< 1.6.1 Search vendor "Mit" for product "Kerberos 5" and version " < 1.6.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				3.1 Search vendor "Debian" for product "Debian Linux" and version "3.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				4.0 Search vendor "Debian" for product "Debian Linux" and version "4.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				5.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "5.10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				6.06 Search vendor "Canonical" for product "Ubuntu Linux" and version "6.06"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				6.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "6.10"		-		Affected