Integer overflow in gtk-vnc (Alpine package)

1) Integer overflow

EUVDB-ID: #VU32990

Risk: High

CVSSv4.0: 5.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-5885

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

Multiple integer overflows in the (1) vnc_connection_server_message and (2) vnc_color_map_set functions in gtk-vnc before 0.7.0 allow remote servers to cause a denial of service (crash) or possibly execute arbitrary code via vectors involving SetColorMapEntries, which triggers a buffer overflow.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

gtk-vnc (Alpine package): 0.6.0-r0

CPE2.3

• cpe:2.3:o:alpine:gtk-vnc_alpine_package:0.6.0-r0:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=e313d76ea818c7a44343d3b19d73a1cc69ab1040
https://git.alpinelinux.org/aports/commit/?id=4324d35c335ce77fe8b3f1d862354b755d7c5f4e
https://git.alpinelinux.org/aports/commit/?id=d7ba0e189fccc1057d2f2de3022b723e8a58a528
https://git.alpinelinux.org/aports/commit/?id=d065be83c388f73c3ec32b0cf07194a5000fdc39

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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