Heap-based buffer overflow in samba (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU32598

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-4408

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the dcerpc_read_ncacn_packet_done function in librpc/rpc/dcerpc_util.c in winbindd in Samba 3.x before 3.6.22, 4.0.x before 4.0.13, and 4.1.x before 4.1.3. A remote attacker can use an invalid fragment length in a DCE-RPC packet. to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 3.4.8-r0 - 3.6.20-r0

External links

http://git.alpinelinux.org/aports/commit/?id=62722265236fe9b456b06077a278c59167d698d0
http://git.alpinelinux.org/aports/commit/?id=c814185629eb7f0e1166f5ba094e8402cefd1587
http://git.alpinelinux.org/aports/commit/?id=34697bf099f0ece957068bf39dc6c622f5141bd0
http://git.alpinelinux.org/aports/commit/?id=5d3b50a2026251615d9737322617519e8711a5de

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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