drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in QEMU
Name: |
Mehrere Probleme in QEMU |
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ID: |
MDVSA-2013:121 |
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Distribution: |
Mandriva |
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Plattformen: |
Mandriva Business Server 1.0 |
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Datum: |
Mi, 10. April 2013, 17:36 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2652
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3515
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-6075
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0185
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0263
https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0025 |
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Applikationen: |
QEMU |
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Originalnachricht |
This is a multi-part message in MIME format...
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_______________________________________________________________________
Mandriva Linux Security Advisory MDVSA-2013:121 http://www.mandriva.com/en/support/security/ _______________________________________________________________________
Package : qemu Date : April 10, 2013 Affected: Business Server 1.0 _______________________________________________________________________
Problem Description:
Updated qemu packages fix security vulnerability: A flaw was found in how qemu, in snapshot mode (-snapshot command line argument), handled the creation and opening of the temporary file used to store the difference of the virtualized guest's read-only image and the current state. In snapshot mode, bdrv_open() creates an empty temporary file without checking for any mkstemp() or close() failures; it also ignores the possibility of a buffer overrun given an exceptionally long /tmp. Because qemu re-opens that file after creation, it is possible to race qemu and insert a symbolic link with the same expected name as the temporary file, pointing to an attacker-chosen file. This can be used to either overwrite the destination file with the privileges of the user running qemu (typically root), or to point to an attacker-readable file that could expose data from the guest to the attacker (CVE-2012-2652). A flaw was found in the way QEMU handled VT100 terminal escape sequences when emulating certain character devices. A guest user with privileges to write to a character device that is emulated on the host using a virtual console back-end could use this flaw to crash the qemu-kvm process on the host or, possibly, escalate their privileges on the host (CVE-2012-3515). It was discovered that the e1000 emulation code in QEMU does not enforce frame size limits in the same way as the real hardware does. This could trigger buffer overflows in the guest operating system driver for that network card, assuming that the host system does not discard such frames (which it will by default) (CVE-2012-6075). _______________________________________________________________________
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2652 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3515 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-6075 https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0185 https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0263 https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0025 _______________________________________________________________________
Updated Packages:
Mandriva Business Server 1/X86_64: 2077322ff415a0f63921650be5b4d7fa mbs1/x86_64/qemu-1.0-8.1.mbs1.x86_64.rpm a4741d08a3dedd1007296ac535ecce83 mbs1/x86_64/qemu-img-1.0-8.1.mbs1.x86_64.rpm 4e9cead8b0e57eec5c5e36abf0318efa mbs1/SRPMS/qemu-1.0-8.1.mbs1.src.rpm _______________________________________________________________________
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All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing:
gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98
You can view other update advisories for Mandriva Linux at:
http://www.mandriva.com/en/support/security/advisories/
If you want to report vulnerabilities, please contact
security_(at)_mandriva.com _______________________________________________________________________
Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux)
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