Vulnerability identifier: #VU32844

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: cve-2011-1003

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ClamAV
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: ClamAV

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Double free vulnerability in the vba_read_project_strings function in vba_extract.c in libclamav in ClamAV before 0.97 might allow remote attackers to execute arbitrary code via crafted Visual Basic for Applications (VBA) data in a Microsoft Office document. NOTE: some of these details are obtained from third party information.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ClamAV: 0.75 - 0.75.1, 0.85 - 0.85.1, 0.86 - 0.86.2, 0.87 - 0.87.1, 0.88 - 0.88.7, 0.90 - 0.90.1, 0.91, 0.92, 0.93 - 0.93.3, 0.94 - 0.94.2, 0.95 - 0.95.3, 0.96 - 0.96.5

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External links
http://git.clamav.net/gitweb?p=clamav-devel.git;a=blob;f=ChangeLog;hb=clamav-0.97
http://git.clamav.net/gitweb?p=clamav-devel.git;a=commit;h=d21fb8d975f8c9688894a8cef4d50d977022e09f
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055771.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055777.html
http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
http://openwall.com/lists/oss-security/2011/02/21/1
http://openwall.com/lists/oss-security/2011/02/21/4
http://osvdb.org/70937
http://secunia.com/advisories/43392
http://secunia.com/advisories/43498
http://secunia.com/advisories/43752
http://securitytracker.com/id?1025100
http://www.mandriva.com/en/support/security/advisories/?name=MDVA-2011:007
http://www.securityfocus.com/bid/46470
http://www.ubuntu.com/usn/USN-1076-1
http://www.vupen.com/english/advisories/2011/0453
http://www.vupen.com/english/advisories/2011/0458
http://www.vupen.com/english/advisories/2011/0523
http://exchange.xforce.ibmcloud.com/vulnerabilities/65544
http://wwws.clamav.net/bugzilla/show_bug.cgi?id=2486

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.