Service interruption via unbounded SMTP line reads
Published Feb 21, 2023 · Updated Nov 25, 2024
Improper resource handling in MistralMail's MTA allows remote attackers to interrupt mail service via oversized SMTP command lines. The SMTP parser called bufio.Reader.ReadString before checking the 512-byte command limit, so it buffered the complete attacker-controlled line in memory. An unauthenticated connection to the MTA listener is sufficient; sustained oversized or unterminated input can exhaust resources and interrupt mail handling.
Summary
What happened
Improper resource handling in MistralMail's MTA allows remote attackers to interrupt mail service via oversized SMTP command lines. The SMTP parser called bufio.Reader.ReadString before checking the 512-byte command limit, so it buffered the complete attacker-controlled line in memory. An unauthenticated connection to the MTA listener is sufficient; sustained oversized or unterminated input can exhaust resources and interrupt mail handling.
The record
- CVE
- CVE-2015-10085
- Published
- Feb 21, 2023
- Updated
- Nov 25, 2024
- Vendor
- MistralMail
- Product
- MistralMail
- Classifications
- CWE-404, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 21, 2023CVE publishedPublication date reported by the CVE source.
- Nov 25, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo