ALT-PU-2021-3237-2

Package update stunnel4 in branch sisyphus

Version5.60-alt1

Published2026-02-04

Max severityHIGH

Severity:

Closed issues (2)

HIGH7.5

Уязвимость кроссплатформенного программного обеспечения для защиты сетевых соединений Stunnel, связанная с ошибками процедуры подтверждения подлинности сертификата, позволяющая нарушителю обойти ограничения безопасности

Published: 2025-08-18Modified: 2025-09-02

CVSS 3.xHIGH 7.5

CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS 2.0HIGH 7.8

CVSS:2.0/AV:N/AC:L/Au:N/C:C/I:N/A:N

References

CVE-2021-20230

HIGH7.5

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

Published: 2021-02-23Modified: 2024-11-21

CVSS 2.0MEDIUM 5.0

CVSS:2.0/AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS 3.xHIGH 7.5

CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References