Quick answers
- Is CVE-1999-0203 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-1999-0203 being exploited in the wild.
- How severe is CVE-1999-0203?
- Critical severity, with a CVSS score of 10, published 17 August 1995.
- Which products and versions are affected?
- Sendmail Sendmail.
- Is there a fix for CVE-1999-0203?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-1999-0203 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-1999-0203?
- Check whether you run Eric Allman Sendmail. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability in Sendmail involves an arbitrary command execution flaw during the handling of bounced emails. By providing a malformed 'MAIL FROM' address and an invalid 'RCPT TO' address via the SMTP protocol, an attacker can force the mailer to generate a bounce message. Due to improper sanitization or handling of the sender address, the bounce process can be manipulated to pipe the message into an arbitrary program. Since Sendmail often runs with high privileges, this allows a remote, unauthenticated attacker to execute commands with root authority on the host system.
Affected products
- Sendmail Sendmail
Timeline
- 1995-08-17: disclosed