CVE-2019-20079 : The autocmd feature in window.c in Vim before 8.1.2136 accesses freed memory.

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

Published 2019-12-30 01:15:12

Updated 2020-10-20 16:04:08

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2019-20079

Canonical » Ubuntu Linux » Version: 14.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 12.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 19.10
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Matching versions
VIM » VIM
Versions from including (>=) 8.1.2121 and before (<) 8.1.2136
cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.19%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 42 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P	8.6	6.4	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Assigned by: nvd@nist.gov (Primary)

https://usn.ubuntu.com/4309-1/

USN-4309-1: Vim vulnerabilities | Ubuntu security notices
Third Party Advisory

CVEs referencing this url
https://packetstormsecurity.com/files/154898

VIM 8.1.2135 Use-After-Free ≈ Packet Storm
Third Party Advisory;VDB Entry
https://github.com/vim/vim/commit/ec66c41d84e574baf8009dbc0bd088d2bc5b2421

patch 8.1.2136: using freed memory with autocmd from fuzzer · vim/vim@ec66c41 · GitHub
Patch;Third Party Advisory
https://github.com/vim/vim/compare/v8.1.2135...v8.1.2136

Comparing v8.1.2135...v8.1.2136 · vim/vim · GitHub
Patch;Third Party Advisory

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