CVSS: 9.3EPSS: 0%CPEs: 1EXPL: 0CVE-2023-38686 – Sydent does not verify email server certificates
https://notcve.org/view.php?id=CVE-2023-38686
04 Aug 2023 — Sydent is an identity server for the Matrix communications protocol. Prior to version 2.5.6, if configured to send emails using TLS, Sydent does not verify SMTP servers' certificates. This makes Sydent's emails vulnerable to interception via a man-in-the-middle (MITM) attack. Attackers with privileged access to the network can intercept room invitations and address confirmation emails. This is patched in Sydent 2.5.6. • https://docs.python.org/3/library/ssl.html?highlight=ssl#security-considerations • CWE-295: Improper Certificate Validation •
CVSS: 7.7EPSS: 0%CPEs: 1EXPL: 0CVE-2021-29431 – SSRF in Sydent due to missing validation of hostnames
https://notcve.org/view.php?id=CVE-2021-29431
15 Apr 2021 — Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources. • https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a • CWE-20: Improper Input Validation CWE-918: Server-Side Request Forgery (SSRF) •
CVSS: 5.7EPSS: 0%CPEs: 1EXPL: 0CVE-2021-29432 – Malicious users could control the content of invitation emails
https://notcve.org/view.php?id=CVE-2021-29432
15 Apr 2021 — Sydent is a reference matrix identity server. A malicious user could abuse Sydent to send out arbitrary emails from the Sydent email address. This could be used to construct plausible phishing emails, for example. This issue has been fixed in 4469d1d. Sydent es un servidor de identidad de matriz de referencia. • https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42 • CWE-20: Improper Input Validation •
CVSS: 7.5EPSS: 1%CPEs: 1EXPL: 0CVE-2021-29430 – Denial of service attack via memory exhaustion
https://notcve.org/view.php?id=CVE-2021-29430
15 Apr 2021 — Sydent is a reference Matrix identity server. Sydent does not limit the size of requests it receives from HTTP clients. A malicious user could send an HTTP request with a very large body, leading to memory exhaustion and denial of service. Sydent also does not limit response size for requests it makes to remote Matrix homeservers. A malicious homeserver could return a very large response, again leading to memory exhaustion and denial of service. • https://github.com/matrix-org/sydent/commit/0523511d2fb40f2738f8a8549868f44b96e5dab7 • CWE-20: Improper Input Validation CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 4.3EPSS: 0%CPEs: 1EXPL: 0CVE-2021-29433 – Denial of service (via resource exhaustion) due to improper input validation
https://notcve.org/view.php?id=CVE-2021-29433
15 Apr 2021 — Sydent is a reference Matrix identity server. In Sydent versions 2.2.0 and prior, sissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. A patch for the vulnerability is in version 2.3.0. No workarounds are known to exist. Sydent es un servidor de identidad de Matrix de referencia. • https://github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da • CWE-20: Improper Input Validation CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2019-11842 – Ubuntu Security Notice USN-6076-1
https://notcve.org/view.php?id=CVE-2019-11842
09 May 2019 — An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID. Se descubrió un problema en Matrix Sydent, versiones anteriores a 1.0.3, y en Synapse, versiones anteriores a 0.99.3.1. La generación de números aleatorios se maneja incorrectamente, lo que facilita a los atacantes la predicción de un token de autenticación de Sydent o un ID aleatorio de... • https://matrix.org/blog/2019/05/03/security-updates-sydent-1-0-3-synapse-0-99-3-1-and-riot-android-0-9-0-0-8-99-0-8-28-a • CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) •
CVSS: 5.9EPSS: 0%CPEs: 1EXPL: 0CVE-2019-11340
https://notcve.org/view.php?id=CVE-2019-11340
19 Apr 2019 — util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on user@bad.example.net@good.example.com returns the user@bad.example.net substring. Vulnerabilidad en archivo util/emailutils.py en Matrix Sydent anterior a las restricciones de registro de la versión 1.0.2 basado en el dominio de correo elect... • https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc • CWE-20: Improper Input Validation •