Home/CVE/The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remote attackers
CVE

CVE-2004-2771

The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remote attackers

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.

HIGH · CVSS 7.5 EPSS 0.02879
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

4
oracle linuxall versions
redhat enterprise linuxall versions
bsd mailx project bsd mailx<= 8.1.2
heirloom mailx<= 12.5
⚠

Public Exploits & PoCs

1
pocbugs.debian.org · bugreport.cgi?bug=278748bugs.debian.org
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalLinux Reverse Shell Indicator
producthighCommunication To LocaltoNet Tunneling Service Initiated - Linux
producthighPotentially Suspicious Malware Callback Communication - Linux
producthighLinux Crypto Mining Pool Connections
producthighCommunication To Ngrok Tunneling Service - Linux
producthighLinux Crypto Mining Indicators
▣

Scoring & Timeline

7.5
HIGH · CVSS v2 (legacy) · secalert@redhat.com
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published to NVD24 Dec 2014 · 06:59 PM
⚑

Vendor Advisories

4
suse-csafopenSUSE-SU-2024:10561-1
msrcCVE-2004-2771
rhsaRHSA-2014:1999Moderate
suse-csafsuse-ru-2015_0876-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin