Debian Exim4 vulnerabilities

CVE-2025-30232 [HIGH] CVE-2025-30232: exim4 - A use-after-free in Exim 4.96 through 4.98.1 could allow users (with command-lin... A use-after-free in Exim 4.96 through 4.98.1 could allow users (with command-line access) to escalate privileges. Scope: local bookworm: resolved (fixed in 4.96-15+deb12u7) bullseye: resolved forky: resolved (fixed in 4.98.1-2) sid: resolved (fixed in 4.98.1-2) trixie: resolved (fixed in 4.98.1-2)

CVE-2025-53881 [MEDIUM] CVE-2025-53881: exim4 - A UNIX Symbolic Link (Symlink) Following vulnerability in logrotate config in th... A UNIX Symbolic Link (Symlink) Following vulnerability in logrotate config in the exim package allowed privilege escalation from mail user/group to root.This issue affects Tumbleweed: from ? before 4.98.2-lp156.248.1. Scope: local bookworm: resolved bullseye: resolved forky: resolved sid: resolved trixie: resolved

CVE-2025-67896 [HIGH] CVE-2025-67896: exim4 - Exim before 4.99.1, with certain non-default rate-limit configurations, allows a... Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation. Scope: local bookworm: resolved bullseye: resolved forky: resolved (fixed in 4.99-7) sid: resolved (fixed in 4.99-7) trixie: resolved

CVE-2025-26794 [HIGH] CVE-2025-26794: exim4 - Exim 4.98 before 4.98.1, when SQLite hints and ETRN serialization are used, allo... Exim 4.98 before 4.98.1, when SQLite hints and ETRN serialization are used, allows remote SQL injection. (Resolving SQL injection requires an update to 4.99.1 in certain non-default rate-limit configurations.) Scope: local bookworm: resolved bullseye: resolved forky: resolved (fixed in 4.98-4) sid: resolved (fixed in 4.98-4) trixie: resolved (fixed in 4.98-4)

CVE-2024-39929 [MEDIUM] CVE-2024-39929: exim4 - Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus rem... Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users. Scope: local bookworm: resolved (fixed in 4.96-15+deb12u5) bullseye: resolved (fixed in 4.94.2-7+deb11u3) forky: resolved (fixe

CVE-2023-42117 [CRITICAL] CVE-2023-42117: exim4 - Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerabi... Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from

CVE-2023-42116 [CRITICAL] CVE-2023-42116: exim4 - Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerabil... Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper

CVE-2023-42115 [CRITICAL] CVE-2023-42115: exim4 - Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerab... Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper

CVE-2023-51766 [MEDIUM] CVE-2023-51766: exim4 - Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configur... Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports . but some other popular e-mail servers do not. Scope: local bookworm: resolve

CVE-2023-42114 [MEDIUM] CVE-2023-42114: exim4 - Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. Thi... Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper va

CVE-2023-42119 [LOW] CVE-2023-42119: exim4 - Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnera... Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the l

CVE-2022-37452 [CRITICAL] CVE-2022-37452: exim4 - Exim before 4.95 has a heap-based buffer overflow for the alias list in host_nam... Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set. Scope: local bookworm: resolved (fixed in 4.94.2-5) bullseye: resolved (fixed in 4.94.2-5) forky: resolved (fixed in 4.94.2-5) sid: resolved (fixed in 4.94.2-5) trixie: resolved (fixed in 4.94.2-5)

CVE-2022-37451 [HIGH] CVE-2022-37451: exim4 - Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because... Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc. Scope: local bookworm: resolved (fixed in 4.95-4) bullseye: resolved forky: resolved (fixed in 4.95-4) sid: resolved (fixed in 4.95-4) trixie: resolved (fixed in 4.95-4)

CVE-2022-3559 [MEDIUM] CVE-2022-3559: exim4 - A vulnerability was found in Exim and classified as problematic. This issue affe... A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability. Scope

CVE-2022-3620 [MEDIUM] CVE-2022-3620: exim4 - A vulnerability was found in Exim and classified as problematic. This issue affe... A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445. It is recommended to apply a patch to fix this issue. The

CVE-2021-38371 [HIGH] CVE-2021-38371: exim4 - The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering... The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending. Scope: local bookworm: resolved (fixed in 4.95~RC2-1) bullseye: resolved (fixed in 4.94.2-7+deb11u4) forky: resolved (fixed in 4.95~RC2-1) sid: resolved (fixed in 4.95~RC2-1) trixie: resolved (fixed in 4.95~RC2-1)

CVE-2021-27216 [MEDIUM] CVE-2021-27216: exim4 - Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a ... 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. Scope: local bookworm: resolved (fixed in 4.94.2-1) bullseye: resolved (fixed in 4.94.2-1) forky: resolved (fixed in 4.94.2-1) sid: resolved (fixed in 4.94.2-1) trixie

CVE-2020-28022 [CRITICAL] CVE-2020-28022: exim4 - Exim 4 before 4.94.2 has Improper Restriction of Write Operations within the Bou... 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. Scope: local bookworm: resolved (fixed in 4.94.2-1) bullseye: resolved (fixed in 4.94.2-1) forky: resolved (fixed in 4.94.2-1) sid: resolved (fixed in 4.94.2-1) trixie: resolved

CVE-2020-28026 [CRITICAL] CVE-2020-28026: exim4 - Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in... 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. Scope: local bookworm: resolved (fixed in 4.94.2

CVE-2020-28024 [CRITICAL] CVE-2020-28024: exim4 - Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated... 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. Scope: local bookworm: resolved (fixed in 4.94.2-1) bullseye: resolved (fixed in 4.94.2-1) forky: resolved (f