SUSE SLES15 Security Update : rsync (SUSE-SU-2026:3634-1)

critical Nessus Plugin ID 337988

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3634-1 advisory.

- CVE-2026-53783: rrsync restricted-directory escape (validation-vs-exec race + unsafe option allowlist) (bsc#1269041).
- CVE-2026-53784: Daemon module-root chdir escape under 'use chroot = no' (bsc#1269042).
- CVE-2026-53785: --relative implied-parent creation escapes the destination tree (bsc#1269043).
- CVE-2026-53786: Daemon --filter merge file bypasses the module filter list (bsc#1269044).
- CVE-2026-53788: Daemon name-converter accepts newline-bearing names into its line protocol (bsc#1269046).
- CVE-2026-53789: Malicious sender expands --delete scope by reclassifying an implied parent (bsc#1269047).
- CVE-2026-53790: Command / argument injection via unquoted peer- or host-controlled values (bsc#1269048).
- CVE-2026-53791: PROXY-protocol mode lets a direct client spoof the daemon's source address (bsc#1269049).
- CVE-2026-53792: Receiver-supplied zero checksum block length drives sender matching negative (bsc#1269050).
- CVE-2026-53793: Chroot '/./' inner-module escape via a parent-component symlink (bsc#1269051).
- CVE-2026-53794: Remote peer disables the per-allocation sanity cap via --max-alloc=0 (bsc#1269052).
- CVE-2026-53795: Receiver write escape via an absolute --temp-dir / --link-dest disabling rename/link confinement (bsc#1269053).
- CVE-2026-53796: Non-daemon receiver destination-chdir symlink race (TOCTOU) (bsc#1269054).
- CVE-2026-53797: Sender source-tree parent-component symlink race -> out-of-tree disclosure (bsc#1269055).
- CVE-2026-53798: Daemon name-converter empty response maps an unknown name to uid/gid 0 (bsc#1269045).
- CVE-2026-53799: Receiver ACL/xattr application follows a symlink-race -> arbitrary ACL set (local privilege escalation) (bsc#1269056).
- CVE-2026-53800: Sender --remove-source-files unlink follows a parent-component symlink race -> arbitrary file deletion outside the source tree (bsc#1269057).
- CVE-2026-53801: Sender/daemon directory-scan enumeration escapes the transfer root / module -> out-of- tree disclosure (bsc#1269058).
- CVE-2026-53802: Arbitrary file read / transfer-shaping via symlinked operator-supplied input files (bsc#1269039).
- CVE-2026-53803: Arbitrary file write / privilege escalation via symlinked operator-supplied output paths (bsc#1269040).
- CVE-2026-70452: `hosts deny` fails OPEN when a configured hostname cannot be resolved, admitting the host it was meant to block (bsc#1273441).
- CVE-2026-70453: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain (bsc#1273440).
- CVE-2026-70454: rsync-ssl establishes an unauthenticated TLS connection (bsc#1273439).
- CVE-2026-70455: Peer-controlled Zstandard worker exhaustion on an rsync daemon (bsc#1273438).
- CVE-2026-70456: Remote out-of-bounds heap write in read_args() when the argument count lands exactly on maxargs (bsc#1273437).
- CVE-2026-70457: Attacker-chosen-offset write in parse_size_arg() error formatting (bsc#1273436).
- CVE-2026-70458: Out-of-bounds write from a FLAG_HLINKED file entry accepted without -H (bsc#1273435).
- CVE-2026-70459: Per-connection daemon child crash from a crafted first incremental file list with a non- directory transfer root (bsc#1273434).
- CVE-2026-70460: Daemon module-root escape through a peer-supplied --partial-dir / --backup-dir resolving via an in- module symlink (bsc#1273433).
- CVE-2026-70461: Peer-driven one-byte heap out-of-bounds write in add_implied_include() (bsc#1273432).
- CVE-2026-70462: Peer-supplied MSG_IO_TIMEOUT defeats the client's own I/O timeout (bsc#1273431).
- CVE-2026-70463: 'auth users' ignores documented comma-only parsing, silently skipping a deny/read-only rule (bsc#1273430).
- CVE-2026-70464: Unauthenticated pre-transfer handshake DoS locks out an rsync daemon module (bsc#1273429).

Tenable has extracted the preceding description block directly from the SUSE 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

Update the affected rsync package.

Plugin Details

Severity: Critical

ID: 337988

File Name: suse_SU-2026-3634-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 8/19/2026

Updated: 8/19/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.96

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-41035

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 8.2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-70460

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:rsync

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/17/2026

Vulnerability Publication Date: 4/16/2026

Reference Information

CVE: CVE-2026-41035, CVE-2026-53783, CVE-2026-53784, CVE-2026-53785, CVE-2026-53786, CVE-2026-53788, CVE-2026-53789, CVE-2026-53790, CVE-2026-53791, CVE-2026-53792, CVE-2026-53793, CVE-2026-53794, CVE-2026-53795, CVE-2026-53796, CVE-2026-53797, CVE-2026-53798, CVE-2026-53799, CVE-2026-53800, CVE-2026-53801, CVE-2026-53802, CVE-2026-53803, CVE-2026-70452, CVE-2026-70453, CVE-2026-70454, CVE-2026-70455, CVE-2026-70456, CVE-2026-70457, CVE-2026-70458, CVE-2026-70459, CVE-2026-70460, CVE-2026-70461, CVE-2026-70462, CVE-2026-70463, CVE-2026-70464

SuSE: SUSE-SU-2026:3634-1

Detections

Analytics