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TI-2009-03363 Aliases CVE-2009-3525GHSA-8xjx-475c-5hjg

The pyGrub boot loader in Xen 3.0.3, 3.3.0, and Xen-3.3.1 does not support the password…

Priority LOW 34CWE-264Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Complete · Complete · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-264.

Summary

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.

Why it matters now

EPSS 0.0124 69th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:xen:xen:3.0.3:*:*:*:*:*:*:*3.0.3VulnerableXen
cpe:2.3:a:xen:xen:3.3.0:*:*:*:*:*:*:*3.3.0VulnerableXen
cpe:2.3:a:xen:xen:3.3.1:*:*:*:*:*:*:*3.3.1VulnerableXen
  • cpe:2.3:a:xen:xen:3.0.3:*:*:*:*:*:*:* Versions 3.0.3 Vulnerable ·Xen
  • cpe:2.3:a:xen:xen:3.3.0:*:*:*:*:*:*:* Versions 3.3.0 Vulnerable ·Xen
  • cpe:2.3:a:xen:xen:3.3.1:*:*:*:*:*:*:* Versions 3.3.1 Vulnerable ·Xen

Remediation

Red Hat 1 advisory

  • RHSA-2009:1472 Released 2009-10-01 · Red Hat rating Moderate
    xen security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) xen-3.0.3-94.el5_4.1, xen-libs-3.0.3-94.el5_4.1, xen-libs-3.0.3-94.el5_4.1.i386 +1
    • Red Hat Enterprise Linux Desktop (v. 5 client) xen-3.0.3-94.el5_4.1, xen-libs-3.0.3-94.el5_4.1, xen-libs-3.0.3-94.el5_4.1.i386
    • Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) xen-3.0.3-94.el5_4.1, xen-3.0.3-94.el5_4.1.i386, xen-devel-3.0.3-94.el5_4.1 +1
    • Red Hat Enterprise Linux Virtualization (v. 5 server) xen-3.0.3-94.el5_4.1, xen-3.0.3-94.el5_4.1.i386, xen-3.0.3-94.el5_4.1.ia64 +3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2009:1472
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2009:1472
Red Hat Enterprise Linux Desktop Multi OS (v. 5 client)Fixed RHSA-2009:1472
Red Hat Enterprise Linux Virtualization (v. 5 server)Fixed RHSA-2009:1472

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-3525
  2. 2026-10-03 Alias added: GHSA-8xjx-475c-5hjg

References

Exploit 3

Patch 1

Advisory 2

Other 1

  • TI-2012-00210 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix… CVSS 2.0HIGH 7.2
  • TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
  • TI-2015-04333 The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used… CVSS 2.0HIGH 9.3
  • TI-2015-06741 The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows… CVSS 3.1CRITICAL 10.0
  • TI-2018-06436 A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures… CVSS 3.0HIGH 7.8
  • TI-2024-20522 x86: Incorrect logic for BTC/SRSO mitigations CVSS 3.1HIGH 7.5
See all 489 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences