
CVE-2020-28014 – Debian Security Advisory 4912-1
https://notcve.org/view.php?id=CVE-2020-28014
06 May 2021 — Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. The -oP option is available to the exim user, and allows a denial of service because root-owned files can be overwritten. Exim 4 versiones anteriores a 4.94.2, permite una ejecución con Privilegios Innecesarios. La opción -oP está disponible para el usuario de exim y permite una denegación de servicio porque los archivos de propiedad root se pueden sobrescribir The Qualys Research Labs reported several vulnerabilities in Exim, a mail tr... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28014-PIDFP.txt • CWE-269: Improper Privilege Management •

CVE-2020-28016 – Ubuntu Security Notice USN-4934-2
https://notcve.org/view.php?id=CVE-2020-28016
06 May 2021 — Exim 4 before 4.94.2 allows an off-by-two Out-of-bounds Write because "-F ''" is mishandled by parse_fix_phrase. Exim 4 versiones anteriores a 4.94.2, permite una Escritura Fuera de Límites por dos pasos porque "-F ''" es manejado inapropiadamente con la función parse_fix_phrase USN-4934-1 fixed several vulnerabilities in Exim. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. CVE-2020-28026 only affected Ubuntu 16.04 ESM. It was discovered that Exim contained multiple... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28016-PFPZA.txt • CWE-787: Out-of-bounds Write •

CVE-2020-28026 – Debian Security Advisory 4912-1
https://notcve.org/view.php?id=CVE-2020-28026
06 May 2021 — Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in non-default configurations that enable Delivery Status Notification (DSN). Certain uses of ORCPT= can place a newline into a spool header file, and indirectly allow unauthenticated remote attackers to execute arbitrary commands as root. Exim 4 versiones anteriores a 4.94.2, presenta una Neutralización Inapropiada de Delimitadores de Línea, relevante en configuraciones no predeterminadas que habilitan la Delivery Status Notifica... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28026-FGETS.txt •

CVE-2020-28022 – Debian Security Advisory 4912-1
https://notcve.org/view.php?id=CVE-2020-28022
06 May 2021 — Exim 4 before 4.94.2 has Improper Restriction of Write Operations within the Bounds of a Memory Buffer. This occurs when processing name=value pairs within MAIL FROM and RCPT TO commands. Exim 4 versiones anteriores a 4.94.2, se presenta una Restricción Inapropiada de Operaciones de Escritura dentro de los límites de un búfer de memoria. Esto ocurre cuando name=value son procesados dentro de los comandos MAIL FROM y RCPT TO The Qualys Research Labs reported several vulnerabilities in Exim, a mail trans... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28022-EXOPT.txt • CWE-787: Out-of-bounds Write •

CVE-2020-28020 – Gentoo Linux Security Advisory 202105-01
https://notcve.org/view.php?id=CVE-2020-28020
06 May 2021 — Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction. Exim 4 versiones anteriores a 4.92, permite un Desbordamiento de Enteros para un Desbordamiento de Búfer, en el que un atacante remoto no autenticado pueda ejecutar código arbitrario aprovechando el manejo inapropiado de líneas de continuación durante la restricción de la longitud del encabe... • http://www.openwall.com/lists/oss-security/2021/07/25/1 • CWE-190: Integer Overflow or Wraparound •

CVE-2020-28024 – Debian Security Advisory 4912-1
https://notcve.org/view.php?id=CVE-2020-28024
06 May 2021 — Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF. Exim 4 versiones anteriores a 4.94.2, permite una Subscripción de Búfer que puede resultar en que unos atacantes remotos no autenticados ejecuten comandos arbitrarios, porque la función smtp_ungetc solo tenía la intención de retroceder caracteres, pero ac... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28024-UNGET.txt • CWE-787: Out-of-bounds Write •

CVE-2020-28021 – Debian Security Advisory 4912-1
https://notcve.org/view.php?id=CVE-2020-28021
06 May 2021 — Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command. Exim 4 versiones anteriores a 4.94.2, presenta una Neutralización Inapropiada de Delimitadores de Línea. Un cliente SMTP remoto autenticado puede insertar caracteres newline en un archivo de cola (que indirectamente conlleva a una ejecución de código remota como... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28021-MAUTH.txt •

CVE-2020-28010 – Debian Security Advisory 4912-1
https://notcve.org/view.php?id=CVE-2020-28010
06 May 2021 — Exim 4 before 4.94.2 allows Out-of-bounds Write because the main function, while setuid root, copies the current working directory pathname into a buffer that is too small (on some common platforms). Exim 4 versiones anteriores a 4.94.2 permite una Escritura Fuera de Límites porque la función principal, mientras que setuid root, copia el nombre de ruta del directorio de trabajo actual en un búfer que es demasiado pequeño (en algunas plataformas comunes) The Qualys Research Labs reported several vulnerabilit... • http://www.openwall.com/lists/oss-security/2021/07/22/7 • CWE-787: Out-of-bounds Write •

CVE-2020-28015 – Ubuntu Security Notice USN-4934-1
https://notcve.org/view.php?id=CVE-2020-28015
04 May 2021 — Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. Local users can alter the behavior of root processes because a recipient address can have a newline character. Exim 4 versiones anteriores a 4.94.2, presenta Neutralización Inapropiada de Delimitadores de Línea. Los usuarios locales pueden alterar el comportamiento de los procesos root porque la dirección de un destinatario pueda tener un carácter newline It was discovered that Exim contained multiple security issues. An attacker could use... • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28015-NLEND.txt •

CVE-2021-27216 – Ubuntu Security Notice USN-4934-1
https://notcve.org/view.php?id=CVE-2021-27216
04 May 2021 — Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options. Exim 4 versiones anteriores a 4.94.2, presenta una Ejecución con Privilegios Innecesarios. Al aprovechar una condición de carrera delete_pid_file, un usuario local puede eliminar archivos arbitrarios como root. • https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28007-LFDIR.txt • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •