Integer overflow in neovim (Alpine package)

1) Integer overflow

EUVDB-ID: #VU33447

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-6349

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

An integer overflow at a u_read_undo memory allocation site would occur for vim before patch 8.0.0377, if it does not properly validate values for tree length when reading a corrupted undo file, which may lead to resultant buffer overflows.

Mitigation

Install update from vendor's website.

Vulnerable software versions

neovim (Alpine package): 0.2.0-r0

CPE2.3

• cpe:2.3:o:alpine:neovim_alpine_package:0.2.0-r0:*:*:*:*:alpine_linux:*:3.6

External links

https://git.alpinelinux.org/aports/commit/?id=9d6c7756fa25f6d0e5c7f4de50c5b0bace40d217
https://git.alpinelinux.org/aports/commit/?id=f5bf7a6023c0e044a089cc7cf27278c45e55b064
https://git.alpinelinux.org/aports/commit/?id=4e2ff29bbe166586bfa55dd3fcd748093df274b4
https://git.alpinelinux.org/aports/commit/?id=c739105d99fb24838dc0ea8ad75bdde1f97f05e6
https://git.alpinelinux.org/aports/commit/?id=70ab2cf105d1d6be0272ef2213cbe36bd59c52c6

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.