CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.6 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, was found in LibVNCServer 0.7.1. Affected is an unknown function of the file auth.c. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, a different issue than CVE-2006-2369.
The bug was discovered 07/05/2006. The weakness was disclosed 07/18/2006 with Debian (Website). The advisory is shared for download at sourceforge.net. This vulnerability is traded as CVE-2006-2450 since 05/18/2006. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.
It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 13 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 22212 (FreeBSD : x11vnc -- authentication bypass vulnerability (9dda3ff1-2b02-11db-a6e2-000e0c2e438a)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165140 (SUSE Security Update for kernel (SUSE-SA:2006:042)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (27737) and Tenable (22212). The entries 2224, 2326, 2360 and 2476 are pretty similar.
Product
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.3VulDB Meta Temp Score: 6.6
VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Improper authenticationCWE: CWE-287
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Proof-of-Concept
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 22212
Nessus Name: FreeBSD : x11vnc -- authentication bypass vulnerability (9dda3ff1-2b02-11db-a6e2-000e0c2e438a)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍
OpenVAS ID: 57253
OpenVAS Name: FreeBSD Ports: x11vnc
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
05/18/2006 🔍07/05/2006 🔍
07/05/2006 🔍
07/05/2006 🔍
07/14/2006 🔍
07/18/2006 🔍
07/18/2006 🔍
08/07/2006 🔍
08/13/2006 🔍
08/14/2006 🔍
03/12/2015 🔍
06/24/2019 🔍
Sources
Advisory: sourceforge.netOrganization: Debian
Status: Not defined
Confirmation: 🔍
CVE: CVE-2006-2450 (🔍)
X-Force: 27737
Vulnerability Center: 12454 - LibVNCServer Authentication Bypass via Insecure Security Type, High
SecurityFocus: 18977 - LibVNCServer Remote Authentication Bypass Vulnerability
Secunia: 20940 - LibVNCServer Authentication Bypass Vulnerability, Highly Critical
OSVDB: 27137 - CVE-2006-2450 - LibVNCServer - Authentication Bypass Issue
Vupen: ADV-2006-2797
See also: 🔍
Entry
Created: 03/12/2015 14:25Updated: 06/24/2019 07:34
Changes: 03/12/2015 14:25 (81), 06/24/2019 07:34 (5)
Complete: 🔍
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