PT-2021-6726 · Lwip+2 · Lwip+2

Silentdawn + 1 · CVE-2020-22283 · Published 2021-07-22 · Updated 2026-06-11

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions lwIP version git head

Description A buffer overflow vulnerability in the icmp6 send response with addrs and netif() function allows attackers to access sensitive information via a crafted ICMPv6 packet. The issue is related to the copying of a buffer without checking the input data, which can be exploited by a remote attacker to gain access to confidential data.

Recommendations As a temporary workaround, consider disabling the icmp6 send response with addrs and netif() function until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2022-02096

CVE-2020-22283

DLA-3655-1

USN-8423-1

Affected Products

Linuxmint

Ubuntu

Lwip

References · 22

• https://bdu.fstec.ru/vul/2022-02096 · Security Note
• https://ubuntu.com/security/CVE-2020-22284 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3655-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8423-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-22283 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-8597 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8423-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-22283 · Security Note
• https://ubuntu.com/security/CVE-2020-22283 · Vendor Advisory
• https://savannah.nongnu.org/bugs/index.php?58553 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-22283 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-8836 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-22283 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-22283 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-22283 · Security Note