Uočena su dva nedostatka otkrivena u radu programskog paketa xen. Udaljeni napadač je mogao iskoristiti spomenute nedostatke za izvođenje napada uskraćivanjem usluge (eng. Denial of Service attack).
Paket:
xen 4.x
Operacijski sustavi:
Debian Linux 6.0 (squeeze), Debian Linux sid (unstable)
Kritičnost:
4.4
Problem:
pogreška u programskoj komponenti
Iskorištavanje:
udaljeno
Posljedica:
uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2012-3432, CVE-2012-3433
Izvorni ID preporuke:
DSA-2531-1
Izvor:
Debian
Problem:
Propusti su posljedica nepravilnosti u pristupu MMIO regijama te neispravnog rukovanja fizičkim memorijskim adresama kod rušenja "p2m" mapiranja.
Posljedica:
Propuste je moguće iskoristiti za izvođenje DoS napada.
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Debian Security Advisory DSA-2531-1 Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
http://www.debian.org/security/ Luciano Bello
August 18, 2012 http://www.debian.org/security/faq
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Package : xen
Vulnerability : Denial of Service
Problem type : remote
Debian-specific: no
CVE ID : CVE-2012-3432 CVE-2012-3433
Debian Bug : 683279
Several denial-of-service vulnerabilities have been discovered in Xen,
the popular virtualization software. The Common Vulnerabilities and
Exposures project identifies the following issues:
CVE-2012-3432
Guest mode unprivileged code, which has been granted the privilege to
access MMIO regions, may leverage that access to crash the whole guest.
Since this be used to crash a client from within, this vulnerability is
consider with low impact.
CVE-2012-3433
A guest kernel can cause the host to become unresponsive for a period
of time, potentially leading to a DoS. Since an attacker with full
control in the guest can impact on the host, this vulnerability is
consider with high impact.
For the stable distribution (squeeze), this problem has been fixed in
version 4.0.1-5.3.
For the unstable distribution (sid), this problem has been fixed in
version 4.1.3-1.
We recommend that you upgrade your xen packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
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