Kerberos on FreeBSD/NetBSD libkrb kdc_reply_cipher memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
8.9 | $0-$5k | 0.00 |
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 vulnerability database at X-Force (5734). See 16422 and 16445 for similar entries.
Product
Name
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 9.3VulDB Meta Temp Score: 8.9
VulDB Base Score: 9.3
VulDB Temp Score: 8.9
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍
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Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
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Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Timeline
12/08/2000 🔍12/08/2000 🔍
02/12/2001 🔍
02/12/2001 🔍
02/12/2001 🔍
03/10/2005 🔍
07/03/2014 🔍
05/30/2019 🔍
Sources
Advisory: ftp.NetBSD.ORGResearcher: Jouko Pynnonen (FIRST)
Status: Confirmed
CVE: CVE-2001-0094 (🔍)
X-Force: 5734 - KTH Kerberos 4 authentication packet buffer overflow
Vulnerability Center: 7263 - FreeBSD libkrb Kerberos 4 Library Local Root Privilege Elevation, Medium
SecurityFocus: 2091 - KTH Kerberos 4 Buffer Overflow Vulnerability
OSVDB: 4891 - KTH Kerberos 4 authentication packet buffer overflow
See also: 🔍
Entry
Created: 07/03/2014 11:16Updated: 05/30/2019 17:00
Changes: 07/03/2014 11:16 (65), 05/30/2019 17:00 (3)
Complete: 🔍
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