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EulerOS 2.0 SP10 : gnutls (EulerOS-SA-2026-2650)

critical Nessus Plugin ID 326603

Synopsis

The remote EulerOS host is missing multiple security updates.

Description

According to the versions of the gnutls packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

 A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.(CVE-2026-42009)

 This ID has been reserved by a CNA(CVE-2026-42014)

 A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest-Shamir-Adleman - Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.(CVE-2026-42010)

 A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains consistent across all fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with conflicting message_length values, causing the implementation to allocate a buffer based on a smaller initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because the merge operation does not enforce proper bounds checking against the allocated buffer size, this results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without authentication via the DTLS handshake path and can lead to application crashes or potential memory corruption.(CVE-2026-33846)

 A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.(CVE-2026-33845)

Tenable has extracted the preceding description block directly from the EulerOS gnutls 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 gnutls packages.

See Also

http://www.nessus.org/u?704e97f2

Plugin Details

Severity: Critical

ID: 326603

File Name: EulerOS_SA-2026-2650.nasl

Version: 1.1

Type: Local

Published: 7/14/2026

Updated: 7/14/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.88

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-42010

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:gnutls-devel, p-cpe:/a:huawei:euleros:gnutls, p-cpe:/a:huawei:euleros:gnutls-help, p-cpe:/a:huawei:euleros:gnutls-utils, cpe:/o:huawei:euleros:2.0

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

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 7/13/2026

Vulnerability Publication Date: 4/30/2026

Reference Information

CVE: CVE-2026-33845, CVE-2026-33846, CVE-2026-42009, CVE-2026-42010, CVE-2026-42014

IAVA: 2026-A-0405