CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
8.0 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, was found in Linux Foundation Xen 3.2.1 (Virtualization Software). This affects an unknown code block. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
qemu-dm.debug in Xen 3.2.1 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/args temporary file.
The bug was discovered 08/24/2008. The weakness was released 11/07/2008 (Website). It is possible to read the advisory at bugs.gentoo.org. This vulnerability is uniquely identified as CVE-2008-4993 since 11/07/2008. Attacking locally is a requirement. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.
The vulnerability was handled as a non-public zero-day exploit for at least 75 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43723 (CentOS 5 : xen (CESA-2009:0003)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117198 (CentOS Security Update for xen (CESA-2009:0003)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (46545) and Tenable (43723). Entries connected to this vulnerability are available at 45647 and 44320.
Product
Type
Vendor
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: 8.4VulDB Meta Temp Score: 8.0
VulDB Base Score: 8.4
VulDB Temp Score: 8.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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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: 🔍
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VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Link followingCWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍
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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Today | unlock | unlock | unlock | unlock |
Nessus ID: 43723
Nessus Name: CentOS 5 : xen (CESA-2009:0003)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 880804
OpenVAS Name: CentOS Update for xen CESA-2009:0003 centos5 i386
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
08/24/2008 🔍11/07/2008 🔍
11/07/2008 🔍
11/07/2008 🔍
11/07/2008 🔍
01/08/2009 🔍
01/12/2009 🔍
01/06/2010 🔍
03/17/2015 🔍
08/23/2019 🔍
Sources
Vendor: linuxfoundation.orgAdvisory: bugs.gentoo.org
Status: Not defined
Confirmation: 🔍
CVE: CVE-2008-4993 (🔍)
OVAL: 🔍
X-Force: 46545
Vulnerability Center: 20474 - XenSource Xen 3.2.1 qemu-dm.debug Local Arbitrary Files Overwrite Vulnerability via Symlink Attack, Medium
OSVDB: 49708 - CVE-2008-4993 - Xen - File Execution Issue
See also: 🔍
Entry
Created: 03/17/2015 16:11Updated: 08/23/2019 17:22
Changes: 03/17/2015 16:11 (70), 08/23/2019 17:22 (7)
Complete: 🔍
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