CVE-1999-1309: Sendmail privilege escalation via large debug value

CVE-1999-1309 · Severity: high · CVSS 7.2 · Published 1996-08-30

Sendmail, a widely used mail transfer agent for routing and delivering email, contains a vulnerability that allows a local user to take full control of the system. By providing a specially crafted large value to the program's debugging feature, an attacker can bypass security restrictions and gain administrative (root) privileges. This could lead to a complete compromise of the server, including the ability to access any data or disrupt email services.

Quick answers

Is CVE-1999-1309 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-1999-1309 being exploited in the wild.
How severe is CVE-1999-1309?
High severity, with a CVSS score of 7.2, published 30 August 1996.
Which products and versions are affected?
Sendmail Sendmail before 8.6.7.
Is there a fix for CVE-1999-1309?
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-1999-1309 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-1999-1309?
Check whether anything you run is named in the advisory. 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

A vulnerability exists in Sendmail versions prior to 8.6.7 due to improper handling of the debug (-d) command line option. A local attacker can provide an excessively large value to this parameter, leading to a memory corruption or buffer overflow condition. Because Sendmail often runs with elevated privileges (setuid root) to manage mail delivery, this flaw allows a non-privileged local user to execute arbitrary code with root privileges. The issue is resolved in Sendmail version 8.6.7.

Affected products

  • Sendmail Sendmail before 8.6.7

Timeline

  • 1994-01-01: disclosed: Vulnerability discussed in Bugtraq and CERT advisories in 1994
  • 1996-08-30: advisory: NVD publication date

References

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