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CVE-2010-0744

20
FAUCET Score

CVE-2010-0744 describes a critical vulnerability in aMSN (Alvaro's Messenger) versions 0.98.3 and earlier, where the application fails to properly validate SSL certificates. Specifically, it does not verify if the server hostname matches the domain name in the certificate's Common Name or Subject Alternative Name fields. This oversight allows man-in-the-middle attackers to impersonate an MSN server using any arbitrary certificate, potentially leading to information disclosure and integrity compromise (CVSS 5.8, AV:N/AC:M/Au:N/C:P/I:P/A:N). While the vulnerability is significant, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or notable community discussion or media coverage, suggesting a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.98.3CPE matchmatch criteria
cpe:2.3:a:alvaro:alvaros_messenger:*:*:*:*:*:*:*:*
0.83CPE matchmatch criteria
cpe:2.3:a:alvaro:alvaros_messenger:0.83:*:*:*:*:*:*:*
0.90CPE matchmatch criteria
cpe:2.3:a:alvaro:alvaros_messenger:0.90:*:*:*:*:*:*:*
0.91CPE matchmatch criteria
cpe:2.3:a:alvaro:alvaros_messenger:0.91:*:*:*:*:*:*:*
0.92CPE matchmatch criteria
cpe:2.3:a:alvaro:alvaros_messenger:0.92:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 37th percentile among its peer group of 19,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2010-0744Moderate

aMSN: Improper SSL certificate validation (MITM) when connecting to the MSN server

Jun 26, 2009

References

amsn.svn.sourceforge.net / viewvc/amsn/trunk/amsn/proxy.tcl
Vendor Advisory
amsn.svn.sourceforge.net / viewvc/amsn/trunk/amsn/sip.tcl
Vendor Advisory
amsn.svn.sourceforge.net / viewvc/amsn/trunk/amsn/soap.tcl
Vendor Advisory
amsn.svn.sourceforge.net / viewvc/amsn/trunk
Vendor Advisory
bugs.debian.org / cgi-bin/bugreport.cgi
lists.fedoraproject.org / pipermail/package-announce/2010-May/041046.html
lists.fedoraproject.org / pipermail/package-announce/2010-May/041079.html
seclists.org / bugtraq/2009/Jun/239
secunia.com / advisories/35621
Vendor Advisory
secunia.com / advisories/39796
opensource-archive.org / showthread.php
openwall.com / lists/oss-security/2010/03/10/4
openwall.com / lists/oss-security/2010/04/01/4
securityfocus.com / bid/35507
vupen.com / english/advisories/2010/1109