U radu programskog paketa dhcp3, distribuiranog s operacijskim sustavom Debian, uočen je novi sigurnosni propust. Program dhcp3 služi za rukovanje DHCP (eng. Dynamic Host Configuration Protocol) protokolom za dodjeljivanje mrežne konfiguracije korisniku IP mreže. Sigurnosna ranjivost je vezana uz pogrešno filtriranje meta-znakova jezgre kod nekih opcija odgovora DHCP poslužitelja. Ovakav propust udaljenom napadaču omogućuje pokretanje proizvoljnih naredbi. Svim se korisnicima paketa dhcp3 savjetuje njegova nadogradnja na novije inačice.

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Debian Security Advisory DSA-2217-1                   Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
http://www.debian.org/security/                                Nico Golde
April 10, 2011                         http://www.debian.org/security/faq
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Package        : dhcp3
Vulnerability  : missing input sanitization
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-0997

Sebastian Krahmer and Marius Tomaschewski discovered that dhclient of
dhcp3, a DHCP client, is not properly filtering shell meta-characters
in certain options in DHCP server responses.  These options are reused in
an insecure fashion by dhclient scripts.  This allows an attacker to execute
arbitrary commands with the privileges of such a process by sending crafted
DHCP options to a client using a rogue server.


For the oldstable distribution (lenny), this problem has been fixed in
version 3.1.1-6+lenny5.

For the stable (squeeze), testing (wheezy) and unstable (sid) distributions,
this problem has been fixed in an additional update for isc-dhcp.


We recommend that you upgrade your dhcp3 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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