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clamav -- heap overflow vulnerability


Clamav team reports:

A heap overflow vulnerability was discovered in libclamav which could cause a denial of service or allow the execution of arbitrary code.

The problem is specifically located in the PE file rebuild function used by the UPX unpacker.

Relevant code from libclamav/upx.c:

memcpy(dst, newbuf, foffset); *dsize = foffset; free(newbuf); cli_dbgmsg("UPX: PE structure rebuilt from compressed file\n"); return 1;

Due to improper validation it is possible to overflow the above memcpy() beyond the allocated memory block.



portaudit: clamav -- heap overflow vulnerability

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If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Officer. Refer to "FreeBSD Security Information" for more information.

Oliver Eikemeier <>