Stack-based buffer overflow in tinc (Alpine package)

1) Stack-based buffer overflow

EUVDB-ID: #VU33106

Risk: Low

CVSSv4.0: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2013-1428

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error within the receive_tcppacket function in net_packet.c when processing a large TCP packet. A remote unauthenticated attacker can trigger stack-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

tinc (Alpine package): 1.0.13-r1 - 1.0.19-r0

xorg-server (Alpine package): 1.10.4-r1

CPE2.3

• cpe:2.3:o:alpine:tinc_alpine_package:1.0.13-r1:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:tinc_alpine_package:1.0.18-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:tinc_alpine_package:1.0.19-r0:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:o:alpine:xorg-server_alpine_package:1.10.4-r1:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=f1087a94a9bdea889cf376bfd6acbbe176eeb2c2
https://git.alpinelinux.org/aports/commit/?id=521799bfd7b00cb81dc138322fab44cca0743e3a
https://git.alpinelinux.org/aports/commit/?id=5e6e2787c3d9c3541f1a80cdd94ca8c99f950a25
https://git.alpinelinux.org/aports/commit/?id=58d6ca608b369072af086916d1eaa8e0e060850c

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

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.