aiosmtplib: STARTTLS response injection

ImpactWhen a connection is upgraded with STARTTLS, aiosmtplib reads the server's 220 go-ahead reply and immediately performs the TLS handshake without discarding any data still sitting in the receive buffer. Bytes the protocol read off the plaintext socket before the handshake survive across the...

Security Bulletin: Multiple security vulnerabilities in .NET affect IBM Robotic Process Automation

Summary Multiple security vulnerabilities in .NET affect IBM Robotic Process Automation. .NET is used by IBM Robotic Process as part of it's development framework. This security bulletin identifies the fixes required to resolve these vulnerabilities Vulnerability Details CVEID:CVE-2026-41319...

CVE-2026-41319

Summary (CVE-2026-41319) MailKit (MimeKit-based) exposes a STARTTLS vulnerability where the internal read buffers of SmtpStream, ImapStream, and Pop3Stream are not flushed when upgrading to TLS with SslStream. This allows pre-TLS attacker-injected data to be treated as post-TLS, enabling a MITM-b...

CVE-2026-41319 MailKit has STARTTLS Response Injection via unflushed stream buffer that enables SASL mechanism downgrade

MailKit is a cross-platform mail client library built on top of MimeKit. A STARTTLS Response Injection vulnerability in versions prior to 4.16.0 allows a Man-in-the-Middle attacker to inject arbitrary protocol responses across the plaintext-to-TLS trust boundary, enabling SASL authentication...

MailKit 注入漏洞

MailKit is a cross-platform email client library developed by Jeffrey Stedfast. Versions of MailKit prior to 4.16.0 had an injection vulnerability. This vulnerability stemmed from STARTTLS response injection, which allowed man-in-the-middle attackers to inject arbitrary protocol responses, thereb...

MailKit has STARTTLS Response Injection via unflushed stream buffer that enables SASL mechanism downgrade

Summary A STARTTLS Response Injection vulnerability in MailKit allows a Man-in-the-Middle attacker to inject arbitrary protocol responses across the plaintext-to-TLS trust boundary, enabling SASL authentication mechanism downgrade e.g., forcing PLAIN instead of SCRAM-SHA-256. The internal read...

MiracleLinux 4 : thunderbird-78.7.0-1.0.1.AXS4 (AXSA:2021-1432:01)

The remote MiracleLinux 4 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2021-1432:01 advisory. Mozilla: Cross-origin information leakage via redirected PDF requests CVE-2021-23953 Mozilla: Type confusion when using logical assignment operators...

MiracleLinux 3 : postfix-2.3.3-2.10.AXS3 (AXSA:2011-150:02)

The remote MiracleLinux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2011-150:02 advisory. Postfix is a Mail Transport Agent MTA, supporting LDAP, SMTP AUTH SASL, TLS Security issues fixed with this release: CVE-2008-2937 Postfix 2.5 before...

TencentOS Server 3: dovecot (TSSA-2022:0239)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2022:0239 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

aiosmptd 安全漏洞

aiosmtpd is an asyncio-based SMTP server. A security vulnerability exists in aiosmptd versions prior to 1.4.6, which stems from the presence of STARTTLS unencrypted command injection...

SUSE CVE-2021-33515

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address...

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.

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SUSE-SU-2021:3351-1 Security update for curl

This update for curl fixes the following issues: - CVE-2021-22947: Fixed STARTTLS protocol injection via MITM bsc1190374. - CVE-2021-22946: Fixed protocol downgrade required TLS bypassed bsc1190373...

SUSE-SU-2021:14807-1 Security update for curl

This update for curl fixes the following issues: - CVE-2021-22947: Fixed STARTTLS protocol injection via MITM bsc1190374. - CVE-2021-22946: Fixed protocol downgrade required TLS bypassed bsc1190373...

OPENSUSE-SU-2021:1225-1 Security update for dovecot23

This update for dovecot23 fixes the following issues: Update dovecot to version 2.3.15 jscSLE-19970: Security issues fixed: - CVE-2021-29157: Dovecot does not correctly escape kid and azp fields in JWT tokens. This may be used to supply attacker controlled keys to validate tokens, if attacker has...

CVE-2020-15955

In s/qmail through 4.0.07, an active MitM can inject arbitrary plaintext commands into a STARTTLS encrypted session between an SMTP client and s/qmail. This allows e-mail messages and user credentials to be sent to the MitM attacker...

UBUNTU-CVE-2021-38371

The STARTTLS feature in Exim through 4.94.2 allows response injection buffering during MTA SMTP sending...

DEBIAN-CVE-2021-33515

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address...

USN-4993-1 dovecot vulnerabilities

Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT tokens. A local attacker could possibly use this issue to validate tokens using arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. CVE-2021-29157 Fabian Ising and Damian Poddebniak discovered that...

SUSE: Security Advisory (SUSE-SU-2012:1147-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...