A buffer overflow vulnerability in the icmp6_send_response_with_addrs_and_netif() function of Free Software Foundation lwIP version git head allows attackers to access sensitive information via a crafted ICMPv6 packet.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8423-1 advisory.

    It was discovered that lwIP contained a buffer overflow in the EAP authentication handling code. An     attacker could possibly use this issue to trigger a buffer overflow, resulting in arbitrary code execution     or a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-8597)

    It was discovered that lwIP incorrectly handled certain ICMPv6 or 6LoWPAN packets. An attacker could     possibly use this issue to trigger a buffer overflow, resulting in information disclosure. This issue only     affected Ubuntu 20.04 LTS. (CVE-2020-22283, CVE-2020-22284)

    It was discovered that lwIP did not properly validate certain SNMPv3 authentication parameters. An     attacker could possibly use this issue to trigger a stack-based buffer overflow, resulting in arbitrary     code execution or a denial of service. (CVE-2026-8836)

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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A buffer overflow vulnerability in the icmp6_send_response_with_addrs_and_netif() function of Free     Software Foundation lwIP version git head allows attackers to access sensitive information via a crafted     ICMPv6 packet. (CVE-2020-22283)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3655 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3655-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     November 18, 2023                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : lwip     Version        : 2.0.3-3+deb10u2     CVE ID         : CVE-2020-22283     Debian Bug     : 991646

    A buffer overflow vulnerability has been found in lwip, a small independent     implementation of the TCP/IPv4/IPv6 protocol suite, which allows an attacker     to access information via a crafted ICMPv6 package. This vulnerability     has been assigned CVE-2020-22283.

    For Debian 10 buster, this problem has been fixed in version     2.0.3-3+deb10u2.

    We recommend that you upgrade your lwip packages.

    For the detailed security status of lwip please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/lwip

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

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

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

ID	Name	Product	Family	Severity
320846	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : lwIP vulnerabilities (USN-8423-1)	Nessus	Ubuntu Local Security Checks	critical
252172	Linux Distros Unpatched Vulnerability : CVE-2020-22283	Nessus	Misc.	high
185980	Debian dla-3655 : liblwip-dev - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2020-22283

high

Tenable Plugins

critical

high

high