Linux Foundation Xen 3.0.3/3.3.0/3.3.1 grub.conf access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.6$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Foundation Xen 3.0.3/3.3.0/3.3.1. This impacts an unknown function of the file grub.conf. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2009-3525. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Linux Foundation Xen 3.0.3/3.3.0/3.3.1 (Virtualization Software). This vulnerability affects an unknown code block of the file grub.conf. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The pyGrub boot loader in Xen 3.0.3, 3.3.0, and Xen-3.3.1 does not support the password option in grub.conf for para-virtualized guests, which allows attackers with access to the para-virtualized guest console to boot the guest or modify the guest s kernel boot parameters without providing the expected password.

The weakness was released 10/05/2009 by Jan Lieskovsky as Bug 525740# as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2009-3525. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67935 (Oracle Linux 5 : xen (ELSA-2009-1472)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165223 (SUSE Security Update for Multiple Packages (SUSE-SR:2010:012)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (33255), Tenable (67935), SecurityFocus (BID 36523†), SecurityTracker (ID 1022950†) and Vulnerability Center (SBV-23607†). Entries connected to this vulnerability are available at VDB-52021, VDB-52680, VDB-52226 and VDB-52111. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
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: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 67935
Nessus Name: Oracle Linux 5 : xen (ELSA-2009-1472)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 880684
OpenVAS Name: CentOS Update for xen CESA-2009:1472 centos5 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/25/2009 🔍
09/25/2009 +0 days 🔍
10/01/2009 +5 days 🔍
10/05/2009 +4 days 🔍
10/05/2009 +0 days 🔍
10/05/2009 +0 days 🔍
07/12/2013 +1376 days 🔍
03/18/2015 +614 days 🔍
12/21/2024 +3566 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: Bug 525740#
Researcher: Jan Lieskovsky
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3525 (🔍)
GCVE (CVE): GCVE-0-2009-3525
GCVE (VulDB): GCVE-100-50356

OVAL: 🔍

SecurityFocus: 36523 - Xen pygrub Local Authentication Bypass Vulnerability
SecurityTracker: 1022950
Vulnerability Center: 23607 - Xen 3.0.3, 3.3 and 3.3.1 Pygrub Bootloader Local Authentication Bypass Vulnerability, Medium

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

Entryinfo

Created: 03/18/2015 15:15
Updated: 12/21/2024 08:07
Changes: 03/18/2015 15:15 (64), 02/15/2017 09:24 (9), 08/23/2021 14:12 (4), 08/23/2021 14:15 (1), 12/07/2024 21:29 (15), 12/21/2024 08:07 (13)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!