SARA / Free Tools / KEV / CVE-2010-4344

CVE-2010-4344 on CISA KEV

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 reje

CISA KEV — Actively Exploited

Exim Heap-Based Buffer Overflow Vulnerability

Vendor / Product
— / Exim / Exim
Added to KEV
2022-03-25
BOD 22-01 due
2022-04-15
Ransomware use
Unknown
CVSS / EPSS
— — · EPSS 61.46%

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

VendorProductVersions
na / n/an/a

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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