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Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : curl vulnerabilities (USN-8084-1)

medium Nessus Plugin ID 302211

Synopsis

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

Description

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8084-1 advisory.

 Zhicheng Chen discovered that curl could incorrectly reuse the wrong connection for Negotiate- authenticated HTTP or HTTPS requests. This could result in the use of credentials from a different connection, contrary to expectations. (CVE-2026-1965)

 It was discovered that curl incorrectly leaked OAuth2 bearer tokens when following a redirect. This could result in tokens being sent to the wrong host, contrary to expectations. (CVE-2026-3783)

 Muhamad Arga Reksapati discovered that curl incorrectly reused existing HTTP proxy connections even if the request used different credentials. This could result in the use of incorrect credentials, contrary to expectations. (CVE-2026-3784)

 Daniel Wade discovered that curl incorrectly handled certain memory operations when doing a second SMB request to the same host. An attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 25.10. (CVE-2026-3805)

 Yihang Zhou discovered that curl incorrectly reused .netrc file credentials when following redirects. This could result in the use of credentials for a different host, contrary to expectations. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-0167)

Tenable has extracted the preceding description block directly from the Ubuntu 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 packages.

See Also

https://ubuntu.com/security/notices/USN-8084-1

Plugin Details

Severity: Medium

ID: 302211

File Name: ubuntu_USN-8084-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/13/2026

Updated: 3/13/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-1965

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

CVSS Score Source: CVE-2026-3784

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libcurl3t64-gnutls, p-cpe:/a:canonical:ubuntu_linux:libcurl3-gnutls, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:canonical:ubuntu_linux:libcurl4t64, p-cpe:/a:canonical:ubuntu_linux:curl, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libcurl4-gnutls-dev, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libcurl3-nss, p-cpe:/a:canonical:ubuntu_linux:libcurl4, p-cpe:/a:canonical:ubuntu_linux:libcurl4-nss-dev, p-cpe:/a:canonical:ubuntu_linux:libcurl4-openssl-dev

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/11/2026

Vulnerability Publication Date: 12/12/2023

Reference Information

CVE: CVE-2025-0167, CVE-2026-1965, CVE-2026-3783, CVE-2026-3784, CVE-2026-3805

IAVA: 2025-A-0085-S, 2026-A-0237

USN: 8084-1