Input validation error in Samba

1) Input validation error

EUVDB-ID: #VU33952

Risk: High

CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2012-1182

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The RPC code generator in Samba 3.x before 3.4.16, 3.5.x before 3.5.14, and 3.6.x before 3.6.4 does not implement validation of an array length in a manner consistent with validation of array memory allocation, which allows remote attackers to execute arbitrary code via a crafted RPC call.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Samba: 3.0 - 3.4.15

External links

http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/078258.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/078726.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/078836.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080567.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00014.html
http://marc.info/?l=bugtraq&m=133951282306605&w=2
http://marc.info/?l=bugtraq&m=134323086902585&w=2
http://secunia.com/advisories/48751
http://secunia.com/advisories/48754
http://secunia.com/advisories/48816
http://secunia.com/advisories/48818
http://secunia.com/advisories/48844
http://secunia.com/advisories/48873
http://secunia.com/advisories/48879
http://secunia.com/advisories/48999
http://support.apple.com/kb/HT5281
http://www.collax.com/produkte/AllinOne-server-for-small-businesses#id2565578
http://www.debian.org/security/2012/dsa-2450
http://www.mandriva.com/security/advisories?name=MDVSA-2012:055
http://www.samba.org/samba/history/samba-3.6.4.html
http://www.securitytracker.com/id?1026913
http://www.ubuntu.com/usn/USN-1423-1
http://www.samba.org/samba/security/CVE-2012-1182

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.