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CVE-2007-4993

26
FAUCET Score

CVE-2007-4993 describes a local command injection vulnerability in pygrub (tools/pygrub/src/GrubConf.py) within Xen 3.0.3. An attacker with elevated privileges in a guest domain can execute arbitrary commands in the host's domain 0 by crafting a malicious grub.conf file. This vulnerability has a CVSS score of 6.9, indicating high severity due to local access, medium attack complexity, and complete compromise of confidentiality, integrity, and availability. While not actively exploited in the wild or on the CISA KEV catalog, public exploit code exists on ExploitDB, though there is no evidence of broader community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.3CPE matchmatch criteria
cpe:2.3:a:xensource_inc:xen:3.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.9MEDIUM

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-30620 · Sep 22, 2007
This CVE's current EPSS score of 0.0063 is in the 82nd percentile among its peer group of 1,595 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, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen-0:3.0.3-25.0.4.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-4993Important

xen guest root can escape to domain 0 through pygrub

Sep 22, 2007

References

bugzilla.xensource.com / bugzilla/show_bug.cgi
secunia.com / advisories/26986
Vendor Advisory
secunia.com / advisories/27047
secunia.com / advisories/27072
secunia.com / advisories/27085
secunia.com / advisories/27103
secunia.com / advisories/27141
secunia.com / advisories/27161
secunia.com / advisories/27486
issues.rpath.com / browse/RPL-1752
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11240
redhat.com / archives/fedora-package-announce/2007-November/msg00004.html
redhat.com / archives/fedora-package-announce/2007-October/msg00030.html
redhat.com / archives/fedora-package-announce/2007-October/msg00082.html
debian.org / security/2007/dsa-1384
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2007-0323.html
securityfocus.com / archive/1/481825/100/0/threaded
securityfocus.com / bid/25825
ubuntu.com / usn/usn-527-1
vupen.com / english/advisories/2007/3348