Apache James prior to release 3.6.1 is vulnerable to a buffering attack relying on the use of the STARTTLS command. This can result in Man-in -the-middle command injection attacks, leading potentially to leakage of sensible information.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-38542
• https://www.openwall.com/lists/oss-security/2022/01/04/1
• http://www.openwall.com/lists/oss-security/2022/01/04/1
• http://www.openwall.com/lists/oss-security/2022/09/20/1