What’s Vulnerable › Vulnerabilities

CVE-2004-2771

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2014-12-24 · updated 2026-09-23
• Weakness: CWE-20

Description

The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in an email address.

Affected products

• Bsd Mailx Project Bsd Mailx: through 8.1.2
• Heirloom Mailx: through 12.5
• Oracle Corporation Oracle Linux: 6, 7
• Red Hat Enterprise Linux: 6.0, 7.0

References

• http://linux.oracle.com/errata/ELSA-2014-1999.html
• http://rhn.redhat.com/errata/RHSA-2014-1999.html
• http://seclists.org/oss-sec/2014/q4/1066
• http://secunia.com/advisories/60940
• http://secunia.com/advisories/61585
• http://secunia.com/advisories/61693
• http://www.debian.org/security/2014/dsa-3105
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=278748
• http://linux.oracle.com/errata/ELSA-2014-1999.html
• http://rhn.redhat.com/errata/RHSA-2014-1999.html
• http://seclists.org/oss-sec/2014/q4/1066
• http://secunia.com/advisories/60940

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