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.
Published 2010-12-14 16:00:04
Updated 2023-02-13 04:28:36
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: OverflowExecute code

Threat overview for CVE-2010-4344

Top countries where our scanners detected CVE-2010-4344
Top open port discovered on systems with this issue 80
IPs affected by CVE-2010-4344 1,550
Threat actors abusing to this issue? Yes
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CVE-2010-4344 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Exim Heap-Based Buffer Overflow Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
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.
Added on 2022-03-25 Action due date 2022-04-15

Exploit prediction scoring system (EPSS) score for CVE-2010-4344

Probability of exploitation activity in the next 30 days: 93.07%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ

Metasploit modules for CVE-2010-4344

  • Exim4 string_format Function Heap Buffer Overflow
    Disclosure Date: 2010-12-07
    First seen: 2020-04-26
    exploit/unix/smtp/exim4_string_format
    This module exploits a heap buffer overflow within versions of Exim prior to version 4.69. By sending a specially crafted message, an attacker can corrupt the heap and execute arbitrary code with the privileges of the Exim daemon. The root cause is that no check i

CVSS scores for CVE-2010-4344

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
9.3
HIGH AV:N/AC:M/Au:N/C:C/I:C/A:C
8.6
10.0
NIST

CWE ids for CVE-2010-4344

References for CVE-2010-4344

Products affected by CVE-2010-4344

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