CVE-2010-4344

unknown KEV

Published 2022-03-25 · Modified 2022-03-25

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

2.5

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.

CISA KEV

Vendor: Exim
Product: Exim
Due date: 2022-04-15

Predictions

Exploit likelihood

99%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-15725 remote linux verified

kingcope · 2010-12-11

Exim 4.63 - Remote Command Execution

Source code queued for fetch — refresh in a moment.

EDB-16925 remote linux verified

Metasploit · 2010-12-16

Exim4 < 4.69 - string_format Function Heap Buffer Overflow (Metasploit)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_unix/smtp/exim4_string_format rank 600

Exim4 string_format Function Heap Buffer Overflow

Source code queued for fetch — refresh in a moment.

OS impact

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`4.70-1`
sid	Fixed	`4.70-1`
forky	Fixed	`4.70-1`
bullseye	Fixed	`4.70-1`
bookworm	Fixed	`4.70-1`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.