Kerberos on FreeBSD/NetBSD libkrb kdc_reply_cipher memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Kerberos on FreeBSD/NetBSD. Affected by this vulnerability is the function kdc_reply_cipher in the library libkrb. This manipulation causes memory corruption. This vulnerability appears as CVE-2001-0094. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kerberos on FreeBSD/NetBSD (affected version unknown). It has been declared as critical. Affected by this vulnerability is the function kdc_reply_cipher in the library libkrb. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in kdc_reply_cipher of libkrb (Kerberos 4 authentication library) in NetBSD 1.5 and FreeBSD 4.2 and earlier, as used in Kerberised applications such as telnetd and login, allows local users to gain root privileges.

The bug was discovered 12/08/2000. The weakness was presented 02/12/2001 by Jouko Pynnonen (FIRST) as confirmed advisory (Website). It is possible to read the advisory at ftp.NetBSD.ORG. This vulnerability is known as CVE-2001-0094. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 66 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5734), SecurityFocus (BID 2091†), OSVDB (4891†) and Vulnerability Center (SBV-7263†). See VDB-16422 and VDB-16445 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.3
VulDB Temp Score: 8.9
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: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

12/08/2000 🔍
12/08/2000 +0 days 🔍
02/12/2001 +66 days 🔍
02/12/2001 +0 days 🔍
02/12/2001 +0 days 🔍
03/10/2005 +1487 days 🔍
07/03/2014 +3402 days 🔍
05/30/2019 +1792 days 🔍

Sourcesinfo

Advisory: ftp.NetBSD.ORG
Researcher: Jouko Pynnonen (FIRST)
Status: Confirmed

CVE: CVE-2001-0094 (🔍)
GCVE (CVE): GCVE-0-2001-0094
GCVE (VulDB): GCVE-100-16423
X-Force: 5734 - KTH Kerberos 4 authentication packet buffer overflow
SecurityFocus: 2091 - KTH Kerberos 4 Buffer Overflow Vulnerability
OSVDB: 4891 - KTH Kerberos 4 authentication packet buffer overflow
Vulnerability Center: 7263 - FreeBSD libkrb Kerberos 4 Library Local Root Privilege Elevation, Medium

See also: 🔍

Entryinfo

Created: 07/03/2014 11:16
Updated: 05/30/2019 17:00
Changes: 07/03/2014 11:16 (65), 05/30/2019 17:00 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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