PT-2017-3323 · Exim+3 · Exim+3
Meh
·
Published
2017-11-23
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Updated
2026-05-14
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CVE-2017-16943
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Exim versions 4.88 through 4.89
Description
The issue is related to the
receive msg function in receive.c within the SMTP daemon of Exim. It allows remote attackers to execute arbitrary code or cause a denial of service due to a use-after-free condition. This can be achieved via vectors involving BDAT commands.Recommendations
For Exim versions 4.88 and 4.89, consider disabling the
receive msg function as a temporary workaround until a patch is available. Restrict access to the SMTP daemon to minimize the risk of exploitation. Avoid using commands that involve BDAT in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
DoS
RCE
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Exim
Suse
Ubuntu