Vulnerability Intelligence Report
Exim Heap-Based Buffer Overflow Vulnerability
CVE-2010-4344
Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:71.79%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-787 ↗CWE-787 Out-of-bounds Write
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| exim | exim | all |
| opensuse | opensuse | 11.1, 11.2, 11.3 |
| debian | debian_linux | 5.0 |
| canonical | ubuntu_linux | 6.06, 8.04, 9.10 |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Red Hat, Inc. · Vendor · USA |
| Reserved | 2010-11-30T00:00:00 |
| Published | 2010-12-14T15:00:00 |
| Patch Date | 2010-12-07 |
| Last Updated | 2025-10-22T00:05:50 |
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