What’s Vulnerable › Vulnerabilities

CVE-2015-9097

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-06-12 · updated 2026-06-17
• Weakness: CWE-93

Description

The mail gem before 2.5.5 for Ruby (aka A Really Ruby Mail Library) is vulnerable to SMTP command injection via CRLF sequences in a RCPT TO or MAIL FROM command, as demonstrated by CRLF sequences immediately before and after a DATA substring.

Affected products

• Mail Project Mail: through 2.5.4

References

• http://openwall.com/lists/oss-security/2015/12/11/3
• http://www.mbsd.jp/Whitepaper/smtpi.pdf
• https://github.com/mikel/mail/commit/72befdc4dab3e6e288ce226a7da2aa474cf5be83
• https://github.com/mikel/mail/pull/1097
• https://github.com/rubysec/ruby-advisory-db/issues/215
• https://hackerone.com/reports/137631
• https://rubysec.com/advisories/mail-OSVDB-131677
• http://openwall.com/lists/oss-security/2015/12/11/3
• http://www.mbsd.jp/Whitepaper/smtpi.pdf
• https://github.com/mikel/mail/commit/72befdc4dab3e6e288ce226a7da2aa474cf5be83
• https://github.com/mikel/mail/pull/1097
• https://github.com/rubysec/ruby-advisory-db/issues/215

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