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Amazon Linux 2023 : rclone (ALAS2023-2026-1607)
medium Nessus Plugin ID 311301
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Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1607 advisory.crypto/tls: handshake messages may be processed at the incorrect encryption level (CVE-2025-61730)
On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was opened. The impact of this escape is limited to reading metadata provided by lstat from arbitrary locations on the filesystem without permitting reading or writing files outside the root. (CVE-2026-27139)
Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value refresh. A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow url= by setting htmlmetacontenturlescape=0. (CVE-2026-27142)
Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool. (CVE-2026-32281)
On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root.
(CVE-2026-32282)
The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack. (CVE-2026-32285)
Context was not properly tracked across template branches for JS template literals, leading to possibly incorrect escaping of content. This could cause actions within JS template literals to be incorrectly escaped, leading to XSS vulnerabilities. (CVE-2026-32289)
gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated the raw, non-canonical path string. Consequently, deny rules defined using canonical paths (starting with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback allow rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific deny rules for canonical paths but allows other requests by default (a fallback allow rule). The vulnerability is exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching authorization interceptors or handlers with a non-canonical path string. While upgrading is the most secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy hardening. (CVE-2026-33186)
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 rclone --releasever 2023.11.20260427' or or 'dnf update --advisory ALAS2023-2026-1607 --releasever 2023.11.20260427' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1607.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2025-61730.html
https://explore.alas.aws.amazon.com/CVE-2026-27139.html
https://explore.alas.aws.amazon.com/CVE-2026-27142.html
https://explore.alas.aws.amazon.com/CVE-2026-32281.html
https://explore.alas.aws.amazon.com/CVE-2026-32282.html
https://explore.alas.aws.amazon.com/CVE-2026-32285.html
Plugin Details
Severity: Medium
ID: 311301
File Name: al2023_ALAS2023-2026-1607.nasl
Version: 1.2
Type: Local
Agent: unix
Published: 4/30/2026
Updated: 5/11/2026
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2026-32289
CVSS v3
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 5.8
Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2026-32282
Vulnerability Information
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:rclone, p-cpe:/a:amazon:linux:rclone-debuginfo, p-cpe:/a:amazon:linux:rclone-debugsource
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/30/2026
Vulnerability Publication Date: 3/18/2026
Reference Information
CVE: CVE-2025-61730, CVE-2026-27139, CVE-2026-27142, CVE-2026-32281, CVE-2026-32282, CVE-2026-32285, CVE-2026-32289, CVE-2026-33186