XMail AddressFromAtPtr function buffer overflow
| xmail-addressfromatptr-bo (22724) |  High Risk |
Description:
XMail is vulnerable to a stack-based buffer overflow caused by improper bounds checking in the AddressFromAtPtr function. By sending specially-crafted email addresses containing a long -t command line option, a local attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges. It may be possible for a local attacker to use this vulnerability to view all encrypted mail that is stored locally within the system mail folders.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of XMail (1.22 or later), available from the XMail Home Web page. See References.
As a workaround, restrict local mail delivery while using a standard mail user-agent to communicate to the XMail SMTP server. See References.
For Debian GNU/Linux:
Refer to DSA-902-1 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2005-12-05 for patch, upgrade, or suggested workaround information. See References.
References:
- Full-Disclosure Mailing List, Thu Oct 13 2005 - 12:16:12 CDT: iDEFENSE Security Advisory 10.13.05: Multiple Vendor XMail 'sendmail' Recipient Buffer Overflow Vulnerability.
- XMail Home Web Page: XMail Home Page.
- BID-15103: XMail Local Buffer Overflow Vulnerability
- CVE-2005-2943: Stack-based buffer overflow in sendmail in XMail before 1.22 allows remote attackers to execute arbitrary code via a long -t command line option.
- DSA-902: xmail -- buffer overflow
- GLSA-200512-05: Xmail: Privilege escalation through sendmail
- OSVDB ID: 20010: XMail -t Argument Command Line Local Overflow
- SA17194: XMail Command Line Buffer Overflow Vulnerability
- SECTRACK ID: 1015055: XMail Buffer Overflow in AddressFromAtPtr() May Let Local Users Gain Elevated Privileges
Platforms Affected:
- Davide Libenzi XMail Mail Server 1.21
- Debian Debian Linux 3.1
- Gentoo Linux
Reported:
Oct 13, 2005
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