Integer overflow in libxcursor (Alpine package)

1) Integer overflow

EUVDB-ID: #VU9517

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-16612

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow when processing malicious cursors in libXcursor library. A remote attacker can use a specially crafted cursor to trigger heap-based buffer overflow and execute arbitrary code on the target system via the application, which uses the vulnerable library, such as GIMP.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

libxcursor (Alpine package): 1.1.10-r0 - 1.1.14-r2

CPE2.3

• cpe:2.3:a:alpine:libxcursor_alpine_package:1.1.10-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:a:alpine:libxcursor_alpine_package:1.1.12-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:a:alpine:libxcursor_alpine_package:1.1.13-r0:*:*:*:*:alpine_linux:*:2.3

External links

https://git.alpinelinux.org/aports/commit/?id=88aa8f79bea1754520678d00194b60f810b6ef9c
https://git.alpinelinux.org/aports/commit/?id=ccdf9c819d11d0b5172ff54418b5d76ab5b3736c

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.