Uočeni su i ispravljeni propusti u radu paketa PHP koje zlonamjerni korisnik može iskoristiti za otkrivanje osjetljivih podataka, proizvoljno izvršavanje programskog koda te izvođenje DoS napada.
Paket:
PHP 5.3.x
Operacijski sustavi:
Debian Linux 5.0 (lenny), Debian Linux 6.0 (squeeze)
Kritičnost:
6.4
Problem:
cjelobrojno prepisivanje, neodgovarajuća provjera ulaznih podataka, pogreška u programskoj funkciji, pogreška u programskoj komponenti, preljev međuspremnika
Propusti su posljedica nepravilnog rukovanja 8-bitnim znakovima u "crypt_blowfish", cjelobrojnog prepisivanja u "exif_process_IFD_TAG", preljeva međuspremnika u "socket_connect" funkciji te neodgovarajuće provjere i sprečavanja kolizije hash vrijednosti.
Posljedica:
Navedene propuste napadač može iskoristiti za pregledosjetljivih informacija, pokretanje proizvoljnog programskog koda te izvođenje napada uskraćivanja usluge.
Rješenje:
Korisnicima se savjetuje korištenje najnovije inačice.
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Debian Security Advisory DSA-2399-1 Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
http://www.debian.org/security/ Thijs Kinkhorst
January 31, 2012 http://www.debian.org/security/faq
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Package : php5
Vulnerability : several
Problem type : remote
Debian-specific: no
CVE ID : CVE-2011-1938 CVE-2011-2483 CVE-2011-4566 CVE-2011-4885
CVE-2012-0057
Several vulnerabilities have been discovered in PHP, the web scripting
language. The Common Vulnerabilities and Exposures project identifies
the following issues:
CVE-2011-1938
The UNIX socket handling allowed attackers to trigger a buffer overflow
via a long path name.
CVE-2011-2483
The crypt_blowfish function did not properly handle 8-bit characters,
which made it easier for attackers to determine a cleartext password
by using knowledge of a password hash.
CVE-2011-4566
When used on 32 bit platforms, the exif extension could be used to
trigger an integer overflow in the exif_process_IFD_TAG function
when processing a JPEG file.
CVE-2011-4885
It was possible to trigger hash collisions predictably when parsing
form parameters, which allows remote attackers to cause a denial of
service by sending many crafted parameters.
CVE-2012-0057
When applying a crafted XSLT transform, an attacker could write files
to arbitrary places in the filesystem.
NOTE: the fix for CVE-2011-2483 required changing the behaviour of this
function: it is now incompatible with some old (wrongly) generated hashes
for passwords containing 8-bit characters. See the package NEWS entry
for details. This change has not been applied to the Lenny version of PHP.
For the oldstable distribution (lenny), these problems have been fixed
in version 5.2.6.dfsg.1-1+lenny14.
For the stable distribution (squeeze), these problems have been fixed
in version 5.3.3-7+squeeze5.
For the testing distribution (wheezy) and unstable distribution (sid),
these problems have been fixed in version 5.3.9-1.
We recommend that you upgrade your php5 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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