Permissions, Privileges, and Access Controls in QEMU - CVE-2011-2527
Published: June 21, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43971
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2011-2527
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
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.
How to mitigate CVE-2011-2527
Install update from vendor's website.
Sources
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081972.html
- http://lists.opensuse.org/opensuse-updates/2012-02/msg00009.html
- http://rhn.redhat.com/errata/RHSA-2011-1531.html
- http://secunia.com/advisories/45187
- http://secunia.com/advisories/45188
- http://secunia.com/advisories/45419
- http://secunia.com/advisories/47157
- http://secunia.com/advisories/47992
- http://ubuntu.com/usn/usn-1177-1
- http://www.openwall.com/lists/oss-security/2011/07/12/15
- http://www.openwall.com/lists/oss-security/2011/07/12/5
- http://www.osvdb.org/74752
- http://www.securityfocus.com/bid/48659
- https://bugs.launchpad.net/qemu/+bug/807893
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68539
- https://www.debian.org/security/2011/dsa-2282