Amazon Linux 2023 : vim-common, vim-data, vim-default-editor (ALAS2023-2024-761)

medium Nessus Plugin ID 211367

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2024-761 advisory.

Vim is an open source command line text editor. Vim < v9.1.0647 has double free in src/alloc.c:616. When closing a window, the corresponding tagstack data will be cleared and freed. However a bit later, the quickfix list belonging to that window will also be cleared and if that quickfix list points to the same tagstack data, Vim will try to free it again, resulting in a double-free/use-after-free access exception.
Impact is low since the user must intentionally execute vim with several non-default flags,but it may cause a crash of Vim. The issue has been fixed as of Vim patch v9.1.0647 (CVE-2024-41957)

The UNIX editor Vim prior to version 9.1.0678 has a use-after-free error in argument list handling. When adding a new file to the argument list, this triggers `Buf*` autocommands. If in such an autocommand the buffer that was just opened is closed (including the window where it is shown), this causes the window structure to be freed which contains a reference to the argument list that we are actually modifying. Once the autocommands are completed, the references to the window and argument list are no longer valid and as such cause an use-after-free. Impact is low since the user must either intentionally add some unusual autocommands that wipe a buffer during creation (either manually or by sourcing a malicious plugin), but it will crash Vim. The issue has been fixed as of Vim patch v9.1.0678. (CVE-2024-43374)

Vim is an improved version of the unix vi text editor. When flushing the typeahead buffer, Vim moves the current position in the typeahead buffer but does not check whether there is enough space left in the buffer to handle the next characters. So this may lead to the tb_off position within the typebuf variable to point outside of the valid buffer size, which can then later lead to a heap-buffer overflow in e.g.
ins_typebuf(). Therefore, when flushing the typeahead buffer, check if there is enough space left before advancing the off position. If not, fall back to flush current typebuf contents. It's not quite clear yet, what can lead to this situation. It seems to happen when error messages occur (which will cause Vim to flush the typeahead buffer) in comnination with several long mappgins and so it may eventually move the off position out of a valid buffer size. Impact is low since it is not easily reproducible and requires to have several mappings active and run into some error condition. But when this happens, this will cause a crash. The issue has been fixed as of Vim patch v9.1.0697. Users are advised to upgrade. There are no known workarounds for this issue. (CVE-2024-43802)

Vim is an open source, command line text editor. A use-after-free was found in Vim < 9.1.0764. When closing a buffer (visible in a window) a BufWinLeave auto command can cause an use-after-free if this auto command happens to re-open the same buffer in a new split window. Impact is low since the user must have intentionally set up such a strange auto command and run some buffer unload commands. However this may lead to a crash. This issue has been addressed in version 9.1.0764 and all users are advised to upgrade.
There are no known workarounds for this vulnerability. (CVE-2024-47814)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'dnf update vim --releasever 2023.6.20241111' to update your system.

Plugin Details

Severity: Medium

ID: 211367

File Name: al2023_ALAS2023-2024-761.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 11/14/2024

Updated: 11/14/2024

Supported Sensors: Agentless Assessment, continuous_assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2024-41957

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:vim-filesystem, p-cpe:/a:amazon:linux:vim-data, p-cpe:/a:amazon:linux:vim-enhanced-debuginfo, p-cpe:/a:amazon:linux:vim-common, p-cpe:/a:amazon:linux:vim-minimal-debuginfo, p-cpe:/a:amazon:linux:xxd-debuginfo, p-cpe:/a:amazon:linux:xxd, p-cpe:/a:amazon:linux:vim-minimal, p-cpe:/a:amazon:linux:vim-enhanced, p-cpe:/a:amazon:linux:vim-default-editor, p-cpe:/a:amazon:linux:vim-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:vim-debugsource

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2024

Vulnerability Publication Date: 8/1/2024

Reference Information

CVE: CVE-2024-41957, CVE-2024-43374, CVE-2024-43802, CVE-2024-47814

Detections

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