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CVE-2008-5103

18
FAUCET Score

CVE-2008-5103 describes a critical vulnerability in VMBuilder 0.9, specifically within the python-vm-builder and ubuntu-vm-builder implementations in Ubuntu 8.10. This flaw causes the root account to be configured with a cleartext password of "!" due to the omission of the -e option when invoking chpasswd, thereby bypassing intended login restrictions. With a CVSS score of 7.2, this vulnerability is highly severe, allowing local attackers to gain complete control (confidentiality, integrity, and availability) with low attack complexity. The EPSS and FAUCET scores, while low, still indicate a significant risk given the potential for full system compromise. Despite its severity, there is no evidence of active exploitation, nor is exploit code publicly available in Metasploit or ExploitDB. Community discussion and media coverage are also absent, suggesting a lack of widespread attention or exploitation at the time of analysis.

Impacted Technologies

VendorProductVersion(s)CPE
0.9CPE matchmatch criteria
cpe:2.3:a:dcgrendel:vmbuilder:0.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

AV:L/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 57th percentile among its peer group of 3,235 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ubuntuvendor investigatingvia nvd_reference
View patch

References

launchpadlibrarian.net / 19619929/vm-builder_0.9-0ubuntu3.1.debdiff
Exploit
osvdb.org / 49996
bugs.launchpad.net / ubuntu/+source/vm-builder/+bug/296841
secunia.com / advisories/32697
PatchVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/46603
securityfocus.com / bid/32292
Patch
ubuntu.com / usn/usn-670-1
Vendor Advisory