CVE-2010-4344
Exim: Heap-Based Buffer Overflow
As of , CVE-2010-4344 in Exim is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 25 March 2022
- US federal deadline
- 15 April 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.72Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.48 on 25 March 2022EPSS on the day CISA listed it.
- Public exploit
- 1 Metasploit module and 2 Exploit-DB entries (2 verified)
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
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.
CISA's 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 that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.
The CVE record's description, from redhat
- CVE published
- 14 December 2010
- Assigned by
- redhat
- CVSS
- 9.8 Critical (CVSS 3.1, from CISA-ADP)
- CWE-787
- Out-of-bounds Write
- CWE-119
- Improper Restriction of Operations within the Bounds of a Memory Buffer
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- Exploit-DB published an exploit (EDB-ID 15725).
- The CVE record was published.
- Exploit-DB published an exploit (EDB-ID 16925).
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: Exim4 string_format Function Heap Buffer Overflowexploit module, rank excellent
- Exploit-DB: Exim4 < 4.69 - string_format Function Heap Buffer Overflow (Metasploit)EDB-ID 16925, verified by Exploit-DB, 16 December 2010
- Exploit-DB: Exim 4.63 - Remote Command ExecutionEDB-ID 15725, verified by Exploit-DB, 11 December 2010
Exim: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2010-4345Privilege Escalation | Exim Exim | Patch this weekMetasploit module; verified Exploit-DB entry | 0.18 | ||
| CVE-2018-6789Buffer Overflow | Exim Exim | Patch this weekRansomware use; EPSS 0.82 | 0.82 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org