pygrub (tools/pygrub/src/GrubConf.py) in Xen 3.0.3, when booting a guest domain, allows…
Priority LOW 31CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
pygrub (tools/pygrub/src/GrubConf.py) in Xen 3.0.3, when booting a guest domain, allows local users with elevated privileges in the guest domain to execute arbitrary commands in domain 0 via a crafted grub.conf file whose contents are used in exec statements.
Why it matters now
EPSS 0.00633 50th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:xensource_inc:xen:3.0.3:*:*:*:*:*:*:* | 3.0.3 | Vulnerable | Xensource Inc |
- cpe:2.3:a:xensource_inc:xen:3.0.3:*:*:*:*:*:*:* Versions 3.0.3 Vulnerable ·Xensource Inc
Remediation
Red Hat 1 advisory
- RHSA-2007:0323 Released 2007-10-02 · Red Hat rating Importantxen security update
- Red Hat Enterprise Linux (v. 5 server) xen-3.0.3-25.0.4.el5, xen-libs-3.0.3-25.0.4.el5, xen-libs-3.0.3-25.0.4.el5.i386 +1
- Red Hat Enterprise Linux Desktop (v. 5 client) xen-3.0.3-25.0.4.el5, xen-libs-3.0.3-25.0.4.el5, xen-libs-3.0.3-25.0.4.el5.i386
- Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) xen-3.0.3-25.0.4.el5, xen-3.0.3-25.0.4.el5.i386, xen-devel-3.0.3-25.0.4.el5 +1
- Red Hat Enterprise Linux Virtualization (v. 5 server) xen-3.0.3-25.0.4.el5, xen-3.0.3-25.0.4.el5.i386, xen-3.0.3-25.0.4.el5.ia64 +3
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2007:0323 |
| Red Hat Enterprise Linux Desktop (v. 5 client) | Fixed | RHSA-2007:0323 |
| Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) | Fixed | RHSA-2007:0323 |
| Red Hat Enterprise Linux Virtualization (v. 5 server) | Fixed | RHSA-2007:0323 |
Timeline
- 2026-10-02 Threatist record created from CVE-2007-4993
- 2026-10-03 Alias added: GHSA-43w7-6v4p-jxc3
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
More Xensource Inc Xen vulnerabilities
- TI-2007-03796 (1) xenbaked and (2) xenmon.py in Xen 3.1 and earlier allow local users to truncate… CVSS 2.0MEDIUM 6.0
- TI-2008-01551 The ssm_i emulation in Xen 5.1 on IA64 architectures allows attackers to cause a denial… CVSS 2.0MEDIUM 4.3
- TI-2007-05647 Xen 3.1.1 does not prevent modification of the CR4 TSC from applications, which allows pv… CVSS 2.0MEDIUM 4.7
- TI-2007-05646 Xen 3.1.1 allows virtual guest system users to cause a denial of service (hypervisor… CVSS 2.0MEDIUM 4.7
- TI-2007-05922 Xen 3.x, possibly before 3.1.2, when running on IA64 systems, does not check the RID… CVSS 2.0LOW 2.1
Sources
- CVE-2007-4993 · CVE Program
- CVE-2007-4993 · NVD
- FIRST EPSS
- GHSA-43w7-6v4p-jxc3 · GitHub Advisory Database · CC BY 4.0
- CVE-2007-4993 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences