U radu programskog paketa ClamAV uočen je sigurnosni propust kojeg udaljeni napadač može iskoristiti za napad uskraćivanjem usluga (DoS).
Paket:
ClamAV 0.x
Operacijski sustavi:
Ubuntu Linux 11.10, Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04
Kritičnost:
3.7
Problem:
pogreška u programskoj komponenti
Iskorištavanje:
udaljeno
Posljedica:
uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2011-3627
Izvorni ID preporuke:
USN-1258-1
Izvor:
Ubuntu
Problem:
Sigurnosni nedostatak je posljedica pogrešnog rukovanja rekurzijom u "cli_bcapi_extract_new()" (libclamav/bytecode_api.c) i "cli_bytecode_runhook()" (libclamav/bytecode.c) funkcijama.
Posljedica:
Udaljeni napadač navedenu ranjivost može iskoristiti za DoS (eng. Denial of Service) napad.
Rješenje:
Svim se korisnicima navedenog programskog paketa, u svrhu zaštite sigurnosti, savjetuje korištenje dostupnih programskih zakrpa.
==========================================================================
Ubuntu Security Notice USN-1258-1
November 10, 2011
clamav vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
Summary:
ClamAV could be made to crash or run programs as your login if it opened a
specially crafted file.
Software Description:
- clamav: Anti-virus utility for Unix
Details:
Stephane Chazelas discovered the bytecode engine of ClamAV improperly
handled recursion under certain circumstances. This could allow a remote
attacker to craft a file that could cause ClamAV to crash, resulting in a
denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
libclamav6 0.97.3+dfsg-1ubuntu0.11.10.1
Ubuntu 11.04:
libclamav6 0.97.3+dfsg-1ubuntu0.11.04.1
Ubuntu 10.10:
libclamav6 0.96.5+dfsg-1ubuntu1.10.10.3
Ubuntu 10.04 LTS:
libclamav6 0.96.5+dfsg-1ubuntu1.10.04.3
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1258-1
CVE-2011-3627
Package Information:
https://launchpad.net/ubuntu/+source/clamav/0.97.3+dfsg-1ubuntu0.11.10.1
https://launchpad.net/ubuntu/+source/clamav/0.97.3+dfsg-1ubuntu0.11.04.1
https://launchpad.net/ubuntu/+source/clamav/0.96.5+dfsg-1ubuntu1.10.10.3
https://launchpad.net/ubuntu/+source/clamav/0.96.5+dfsg-1ubuntu1.10.04.3
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