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CVE-2023-51766

Status Candidate

Overview

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 <LF>.<CR><LF> but some other popular e-mail servers do not.

Related Files

Gentoo Linux Security Advisory 202402-18
Posted Feb 19, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202402-18 - Multiple vulnerabilities have been discovered in Exim, the worst of which can lead to remote code execution. Versions greater than or equal to 4.97.1 are affected.

tags | advisory, remote, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2023-42114, CVE-2023-42115, CVE-2023-42116, CVE-2023-42117, CVE-2023-42119, CVE-2023-51766
SHA-256 | baabebed21673e40b564e5721f4a8c2ad8b2d62a34a694a4ab0c3fd9b9eddfdc
Ubuntu Security Notice USN-6611-1
Posted Jan 29, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6611-1 - It was discovered that Exim incorrectly handled certain requests. A remote attacker could possibly use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism.

tags | advisory, remote, spoof
systems | linux, ubuntu
advisories | CVE-2023-51766
SHA-256 | b33d9594531fb5ded7e43cda39e1b8b5720e24099cccb39fd5e09998a9663739
Debian Security Advisory 5597-1
Posted Jan 5, 2024
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5597-1 - It was discovered that Exim, a mail transport agent, can be induced to accept a second message embedded as part of the body of a first message in certain configurations where PIPELINING or CHUNKING on incoming connections is offered.

tags | advisory
systems | linux, debian
advisories | CVE-2023-51766
SHA-256 | c07124cdc31734b4be52276427c0adc4c564e3e489e29e0b9d3007047f785ba9
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