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Exim - Remote Code Execution (CVE-2019-10149)

Severity
CVSSv3 Score
9.8
Vulnerability description

Exim server is affected by a Remote Code Execution vulnerability. The root cause of this vulnerability consists in a lack of validation of recipient address in deliver_message() function. Therefore, an unauthenticated remote attacker could send an email to ${run{command in hex format}}@localhost and trigger the vulnerability.

Risk description

The risk exists that a remote unauthenticated attacker can fully compromise the server in order to steal confidential information, install ransomware, or pivot to the internal network.

Exploit capabilities

Sniper can gain unauthenticated Remote Code Execution on the target system and extract multiple artefacts as evidence.

Recommendation

Upgrade Exim mail server to a version equal or higher of 4.92.

Codename
Not available
Detectable with
Network Scanner
Exploitable with Sniper
Yes
Vuln date
Jul 2019
Published at
Updated at
Software Type
Mail Transfer Agent
Vendor
Exim
Product
Exim