libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulnerabilities

libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulnerabilities Multiple vulnerabilities were found in libarchive (formerly named as app-archive/bsdtar), possibly allowing for the execution of arbitrary code or a Denial of Service. libarchive 2007-08-08 2007-08-08 184984 remote 2.2.4 2.2.4

libarchive is a library for manipulating different streaming archive formats, including certain tar variants, several cpio formats, and both BSD and GNU ar variants.

CPNI, CERT-FI, Tim Kientzle, and Colin Percival reported a buffer overflow (CVE-2007-3641), an infinite loop (CVE-2007-3644), and a NULL pointer dereference (CVE-2007-3645) within the processing of archives having corrupted PaX extension headers.

An attacker can trick a user or automated system to process an archive with malformed PaX extension headers into execute arbitrary code, crash an application using the library, or cause a high CPU load.

There is no known workaround at this time.

All libarchive or bsdtar users should upgrade to the latest libarchive version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/libarchive-2.2.4"

CVE-2007-3641 CVE-2007-3644 CVE-2007-3645 jaervosz DerCorny jaervosz