Exim SMTP Service Zero-day Flaw Let Attackers Execute Remote Code
Six contemporary zero-day vulnerabilities in Exim Message Switch Agent had been reported as piece of the Zero-Day initiative. These vulnerabilities had been stumbled on in June 2022 nonetheless had been no longer disclosed unless now as Exim didn’t repair them.
Though these vulnerabilities had been published now, only three of the six vulnerabilities had been mounted, which consist of 1 Serious severity (9.8), 1 high severity (8.1), and 1 low severity (3.7) vulnerabilities.
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Mounted Vulnerabilities
The vulnerability that had the excellent severity among the six reported vulnerabilities used to be CVE-2023-42115 associated with an out-of-bounds write in Exim AUTH, resulting in faraway code execution. This vulnerability had the excellent severity of 9.8 (Serious), which Exim mounted.
The high vulnerability mounted by Exim used to be CVE-2023-42116, which used to be connected to a stack-basically based buffer overflow that exists attributable to sinful validation in the handling of NTLM negate requests, resulting in faraway code execution. This vulnerability has a severity of 8.1 (High).
As well to this, the opposite low-severity vulnerability used to be CVE-2023-42114, which used to be linked with an out-of-bounds read resulting in records disclosure. The severity of this vulnerability used to be 3.7 (Low), which Exim also mounted.
Now not-Mounted Vulnerabilities
Three of the zero-days had been no longer mounted by Exim yet, which consist of two high-severity and one low-severity vulnerability. The 2 high-severity vulnerabilities had been CVE-2023-42117 (8.1), CVE-2023-42118 (7.8), and CVE-2023-42119 (3.1).
CVE-2023-42117 used to be an Exim proxy vulnerability that existed attributable to the usage of an untrusted proxy server, whereas CVE-2023-42118 used to be associated with the “SPF” situation utilized in an ACL. Nevertheless, CVE-2023-42119 used to be one more out-of-bounds read records disclosure vulnerability that existed in the Exim dnsdb.
Furthermore, CVE-2023-42115 used to be analyzed by researchers at watchTowr, and a proof-of-theory used to be published, offering detailed records in regards to the severity, exploitation, and code review of the vulnerability.
As well to this, one more sage used to be also published by SecLists, which details the vulnerability and their fixes. Furthermore, Exim has also launched an inventory of their fixes on this hyperlink.
Source credit : cybersecuritynews.com
