libESMTP NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

BID:38528

Info

libESMTP NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

Bugtraq ID: 38528
Class: Design Error
CVE: CVE-2010-1192
Remote: Yes
Local: No
Published: Mar 03 2010 12:00AM
Updated: Oct 04 2010 07:50PM
Credit: Kees Cook
Vulnerable: S.u.S.E. SUSE Linux Enterprise 11
S.u.S.E. openSUSE 11.2
S.u.S.E. openSUSE 11.1
S.u.S.E. openSUSE 11.0
MandrakeSoft Linux Mandrake 2010.1 x86_64
MandrakeSoft Linux Mandrake 2010.1
MandrakeSoft Linux Mandrake 2010.0 x86_64
MandrakeSoft Linux Mandrake 2010.0
MandrakeSoft Linux Mandrake 2009.1 x86_64
MandrakeSoft Linux Mandrake 2009.1
MandrakeSoft Linux Mandrake 2009.0 x86_64
MandrakeSoft Linux Mandrake 2009.0
MandrakeSoft Linux Mandrake 2008.0 x86_64
MandrakeSoft Linux Mandrake 2008.0
MandrakeSoft Enterprise Server 5 x86_64
MandrakeSoft Enterprise Server 5
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 4.0
libesmtp libesmtp 1.0.4
libesmtp libesmtp 1.0
libesmtp libesmtp 0.8.12
libesmtp libesmtp 0.8.11
libesmtp libesmtp 0.8.10 p1
libesmtp libesmtp 0.8.10
libesmtp libesmtp 0.8.9
libesmtp libesmtp 0.8.4
+ RedHat Linux 7.3 i686
 + RedHat Linux 7.3 i386
 + RedHat Linux 7.3
+ RedHat Linux 7.2 ia64
 + RedHat Linux 7.2 i686
 + RedHat Linux 7.2 i586
 + RedHat Linux 7.2 i386
 + RedHat Linux 7.2
+ Sun Linux 5.0
Not Vulnerable:

Discussion

libESMTP NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

libESMTP is prone to a security-bypass vulnerability because the application fails to properly validate the domain name in a signed CA certificate, allowing attackers to substitute malicious SSL certificates for trusted ones.

Successfully exploiting this issue allows attackers to perform man-in-the-middle attacks or impersonate trusted servers, which will aid in further attacks.

libESMTP 1.0.4 is vulnerable; other versions may also be affected.

Exploit / POC

libESMTP NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

Attackers use man-in-the-middle attacks to exploit this issue.

Solution / Fix

libESMTP NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

Solution:
Updates are available. Please see the references for more information.


MandrakeSoft Linux Mandrake 2010.0 x86_64

MandrakeSoft Linux Mandrake 2009.1 x86_64

MandrakeSoft Linux Mandrake 2010.1

MandrakeSoft Linux Mandrake 2009.0

MandrakeSoft Enterprise Server 5 x86_64

MandrakeSoft Corporate Server 4.0

MandrakeSoft Linux Mandrake 2009.0 x86_64

MandrakeSoft Linux Mandrake 2008.0 x86_64

MandrakeSoft Enterprise Server 5

MandrakeSoft Linux Mandrake 2008.0

MandrakeSoft Linux Mandrake 2010.1 x86_64

MandrakeSoft Linux Mandrake 2009.1

MandrakeSoft Linux Mandrake 2010.0

MandrakeSoft Corporate Server 4.0 x86_64

References

libESMTP NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

References:

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report