qemu: when started as root, extra groups are not dropped correctly
Published Jun 21, 2012
2.1
LOWCVSS 2.0
EPSS 0.44%
Description
The change_process_uid function in os-posix.c in Qemu 0.14.0 and earlier does not properly drop group privileges when the -runas option is used, which allows local guest users to access restricted files on the host.
Affected products
No data.
- ≤ 0.14.0
- 0.1.0
- 0.1.1
- 0.1.2
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.2.0
- 0.3.0
- 0.4.0
- 0.4.1
- 0.4.2
- 0.4.3
- 0.6.0
- 0.6.1
- 0.7.0
- 0.7.1
- 0.7.2
- 0.8.0
- 0.8.1
- 0.8.2
- 0.9.0
- 0.9.1
- 0.9.1-5
- 0.10.0
- 0.10.1
- 0.10.2
- 0.10.3
- 0.10.4
- 0.10.5
- 0.10.6
- 0.11.0
- 0.11.0
- 0.11.0
- 0.11.0
- 0.11.0-rc0
- 0.11.0-rc1
- 0.11.0-rc2
- 0.11.1
- 0.12.0
- 0.12.0
- 0.12.0
- 0.12.1
- 0.12.2
- 0.12.3
- 0.12.4
- 0.12.5
- 0.13.0
- 0.13.0
- 0.13.0
- 0.14.0
- 0.14.0
- 0.14.0
- 0.14.1
- 0.15.0
- 0.15.0
No data.
Red Hat Enterprise Linux 6
qemu-kvm-2:0.12.1.2-2.209.el6
Fixed · RHSA-2011:1531
Red Hat Enterprise Linux 5
kvm
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm-2:0.12.1.2-2.209.el6 | Fixed | RHSA-2011:1531 |
| Red Hat Enterprise Linux 5 | kvm | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Future qemu-kvm updates in Red Hat Enterprise Linux 6 may address this flaw. This issue did not affect the versions of qemu-kvm as shipped with Red Hat Enterprise Linux 5 as it did not include support for "run as" functionality.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.44% (0.00439) | 35.84th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.43% (0.00435) | 34.50th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00088) | 23.05th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00064) | 30.08th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.06% (0.00064) | 28.17th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00064) | 26.16th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
References (20)
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081972.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2012-02/msg00009.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2011-1531.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/45187 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/45188 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/45419 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/47157 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/47992 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://ubuntu.com/usn/usn-1177-1 vendor-advisoryx_refsource_UBUNTU
- http://www.openwall.com/lists/oss-security/2011/07/12/15 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2011/07/12/5 mailing-listx_refsource_MLIST
- http://www.osvdb.org/74752 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/48659 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-2527 Vendor Advisory
- https://bugs.launchpad.net/qemu/+bug/807893 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=720773 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68539 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-2527
- https://www.cve.org/CVERecord?id=CVE-2011-2527
- https://www.debian.org/security/2011/dsa-2282 vendor-advisoryx_refsource_DEBIAN
Change history (0)
No recorded changes yet.