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CVE-2011-1923

16
FAUCET Score

CVE-2011-1923 describes a vulnerability in the Diffie-Hellman key-exchange implementation within PolarSSL before version 0.14.2. Specifically, the dhm.c file fails to properly validate a public parameter, making it susceptible to man-in-the-middle (MitM) attacks. This flaw allows attackers to more easily obtain the shared secret key by modifying network traffic, similar to CVE-2011-5095. With a CVSS score of 4.0 (AV:N/AC:H/Au:N/C:P/I:P/A:N), it indicates a network-based attack with high complexity, leading to partial confidentiality and integrity impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.14.0CPE matchmatch criteria
cpe:2.3:a:polarssl:polarssl:*:*:*:*:*:*:*:*
0.10.0CPE matchmatch criteria
cpe:2.3:a:polarssl:polarssl:0.10.0:*:*:*:*:*:*:*
0.10.1CPE matchmatch criteria
cpe:2.3:a:polarssl:polarssl:0.10.1:*:*:*:*:*:*:*
0.11.0CPE matchmatch criteria
cpe:2.3:a:polarssl:polarssl:0.11.0:*:*:*:*:*:*:*
0.11.1CPE matchmatch criteria
cpe:2.3:a:polarssl:polarssl:0.11.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

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

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

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 37th percentile among its peer group of 19,956 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

Remediation records are not available for this CVE.

References

polarssl.org / trac/wiki/SecurityAdvisory201101
Vendor Advisory
cl.cam.ac.uk / ~rja14/Papers/psandqs.pdf
nessus.org / plugins/index.php
securityfocus.com / bid/46670