CVE-2011-1923

The Diffie-Hellman key-exchange implementation in dhm.c in PolarSSL before 0.14.2 does not properly validate a public parameter, which makes it easier for man-in-the-middle attackers to obtain the shared secret key by modifying network traffic, a related issue to CVE-2011-5095.

Published: 2012-06-20 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1923 is rated Low Risk (36.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.36%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1923

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-07-13 0.26% 0.36% +0.09%
2 2025-03-30 0.55% 0.26% -0.28%
3 2025-03-29 — 0.55% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1923

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 4.9 [email protected]

Weakness enumeration for CVE-2011-1923

OS Trackers for CVE-2011-1923

vendor priority summary link
gentoo normal CVE-2011-1923: 1 GLSA(s) (201310-10), 1 atom(s) (net-libs/polarssl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1923
ubuntu medium CVE-2011-1923 medium priority: Ubuntu including 1 source packages (polarssl), 10 status rows across 10 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): not-affected 5, ignored 3, DNE 1, released 1. https://ubuntu.com/security/CVE-2011-1923

Affected software / configurations for CVE-2011-1923

Vendor Product Version Raw CPE
polarssl polarssl <= 0.14.0 cpe:2.3:a:polarssl:polarssl:*:*:*:*:*:*:*:*
polarssl polarssl 0.10.0 cpe:2.3:a:polarssl:polarssl:0.10.0:*:*:*:*:*:*:*
polarssl polarssl 0.10.1 cpe:2.3:a:polarssl:polarssl:0.10.1:*:*:*:*:*:*:*
polarssl polarssl 0.11.0 cpe:2.3:a:polarssl:polarssl:0.11.0:*:*:*:*:*:*:*
polarssl polarssl 0.11.1 cpe:2.3:a:polarssl:polarssl:0.11.1:*:*:*:*:*:*:*
polarssl polarssl 0.12.0 cpe:2.3:a:polarssl:polarssl:0.12.0:*:*:*:*:*:*:*
polarssl polarssl 0.12.1 cpe:2.3:a:polarssl:polarssl:0.12.1:*:*:*:*:*:*:*
polarssl polarssl 0.13.1 cpe:2.3:a:polarssl:polarssl:0.13.1:*:*:*:*:*:*:*

References for CVE-2011-1923

cvelogic Threat Intelligence