Use-after-free in Vim Vim



Published: 2019-12-30 | Updated: 2020-07-17
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-20079
CWE-ID CWE-416
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Vim
Client/Desktop applications / Office applications

Vendor Vim.org

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU30494

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-20079

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The autocmd feature in window.c in Vim before 8.1.2136 accesses freed memory.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vim: 8.1.0000 - 8.1.2135

External links

http://github.com/vim/vim/commit/ec66c41d84e574baf8009dbc0bd088d2bc5b2421
http://github.com/vim/vim/compare/v8.1.2135...v8.1.2136
http://packetstormsecurity.com/files/154898
http://usn.ubuntu.com/4309-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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



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