Uočeno je nekoliko sigurnosnih propusta u paketu Thunderbird, a udaljeni napadači ih mogu iskoristiti za izvršavanje programskog koda, pristup datotečnom sustavu, izvođenje DoS napada ili pokretanje zlonamjerno oblikovanog sadržaja.
Paket:
thunderbird 3.x
Operacijski sustavi:
Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04
Kritičnost:
8.7
Problem:
korupcija memorije, neodgovarajuće rukovanje memorijom, pogreška u programskoj komponenti, XSS
Iskorištavanje:
lokalno/udaljeno
Posljedica:
neovlašteni pristup sustavu, proizvoljno izvršavanje programskog koda, umetanje HTML i skriptnog koda, uskraćivanje usluga (DoS)
Neki od propusta su: korupcija memorije u Gecko i SpiderMonkey JavaScripti komponentama, XSS ranjivost pri obradi višestrukih Location zaglavlja te neodgovarajuće rukovanje Enter tipkom.
Posljedica:
Propuste mogu iskoristiti udaljeni napadači kako bi pokretali proizvoljni programski kod, neovlašteno pristupili lokalnom datotečnom sustavu, izveli DoS napad ili pokretali zlonamjerno oblikovani sadržaj.
Rješenje:
Detaljnije informacije o propustima nalaze se izvornoj preporuci. Korisnici se potiču na korištenje odgovarajuće programske nadogradnje.
==========================================================================
Ubuntu Security Notice USN-1213-1
September 28, 2011
thunderbird vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
Summary:
Multiple vulnerabilities were fixed in Thunderbird.
Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client
Details:
Benjamin Smedberg, Bob Clary, Jesse Ruderman, and Josh Aas discovered
multiple memory vulnerabilities in the Gecko rendering engine. An
attacker could use these to possibly execute arbitrary code with the
privileges of the user invoking Thunderbird. (CVE-2011-2995, CVE-2011-2996)
Boris Zbarsky discovered that a frame named "location" could shadow the
window.location object unless a script in a page grabbed a reference to the
true object before the frame was created. This is in violation of the Same
Origin Policy. A malicious E-Mail could possibly use this to access the
local file system. (CVE-2011-2999)
Mark Kaplan discovered an integer underflow in the SpiderMonkey JavaScript
engine. An attacker could potentially use this to crash Thunderbird.
Ian Graham discovered that when multiple Location headers were present,
Thunderbird would use the second one resulting in a possible CRLF injection
attack. CRLF injection issues can result in a wide variety of attacks, such
as XSS (Cross-Site Scripting) vulnerabilities, browser cache poisoning, and
cookie theft. (CVE-2011-3000)
Mariusz Mlynski discovered that if the user could be convinced to hold down
the enter key, a malicious website or E-Mail could potential pop up a
download dialog and the default open action would be selected. This would
result in potentially malicious content being run with privileges of the
user invoking Thunderbird. (CVE-2011-2372)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
thunderbird 3.1.15+build1+nobinonly-0ubuntu0.11.04.1
Ubuntu 10.10:
thunderbird 3.1.15+build1+nobinonly-0ubuntu0.10.10.1
Ubuntu 10.04 LTS:
thunderbird 3.1.15+build1+nobinonly-0ubuntu0.10.04.1
After a standard system update you need to restart Thunderbird to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1213-1
CVE-2011-2372, CVE-2011-2995, CVE-2011-2996, CVE-2011-2999,
CVE-2011-3000
Package Information:
https://launchpad.net/ubuntu/+source/thunderbird/3.1.15+build1+nobinonly-0ubuntu0.11.04.1
https://launchpad.net/ubuntu/+source/thunderbird/3.1.15+build1+nobinonly-0ubuntu0.10.10.1
https://launchpad.net/ubuntu/+source/thunderbird/3.1.15+build1+nobinonly-0ubuntu0.10.04.1
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