[security-alerts] FW: [SA21374] Clam AntiVirus pefromupx() Buffer Overflow Vulnerability

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> TITLE:
> Clam AntiVirus pefromupx() Buffer Overflow Vulnerability
> 
> SECUNIA ADVISORY ID:
> SA21374
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/21374/
> 
> CRITICAL:
> Highly critical
> 
> IMPACT:
> DoS, System access
> 
> WHERE:
> From remote
> 
> SOFTWARE:
> Clam AntiVirus (clamav) 0.x
> http://secunia.com/product/2538/
> 
> DESCRIPTION:
> Damian Put has discovered a vulnerability in Clam AntiVirus, which
> can be exploited by malicious people to cause a DoS (Denial of
> Service) and potentially compromise a vulnerable system.
> 
> The vulnerability is caused due to an boundary error in the
> "pefromupx()" function in libclamav/upx.c when unpacking PE
> executable files compressed with UPX. This can be exploited to cause
> a heap-based buffer overflow via a specially crafted UPX compressed
> file.
> 
> Successful exploitation crashes the service and may allow execution
> of arbitrary code.
> 
> The vulnerability has been confirmed in versions 0.88.2 and 0.88.3.
> Other versions may also be affected.
> 
> SOLUTION:
> Disable the "ScanPE" option for clamd and start clamscan with the
> "--no-pe" option. Please note that this completely disables the
> scanning of PE files. Then block or filter PE files in some other
> way.
> 
> PROVIDED AND/OR DISCOVERED BY:
> Damian Put
> 
> ORIGINAL ADVISORY:
> http://www.overflow.pl/adv/clamav_upx_heap.txt
>