Vulnerability Name:

CVE-2011-1923 (CCN-65864)

Assigned:2011-02-25
Published:2011-02-25
Updated:2013-10-24
Summary: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.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:N)
3.0 Low (Temporal CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
4.3 Medium (CCN CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
3.2 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-310
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2011-1923

Source: CCN
Type: PolarSSL Security Advisory 2011-01
Possible man in the middle in Diffie Hellman key exchange

Source: CONFIRM
Type: Vendor Advisory
http://polarssl.org/trac/wiki/SecurityAdvisory201101

Source: CCN
Type: SA43595
PolarSSL Diffie-Hellman Key Exchange Vulnerability

Source: MISC
Type: UNKNOWN
http://www.cl.cam.ac.uk/~rja14/Papers/psandqs.pdf

Source: MISC
Type: UNKNOWN
http://www.nessus.org/plugins/index.php?view=single&id=53360

Source: CCN
Type: OSVDB ID: 70945
PolarSSL Diffie-Hellman Key Exchange Predictable Secret MiTM Weakness

Source: BID
Type: UNKNOWN
46670

Source: CCN
Type: BID-46670
PolarSSL Diffie Hellman Key Exchange Security Bypass Vulnerability

Source: XF
Type: UNKNOWN
polarssl-diffiehellman-sec-bypass(65864)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:polarssl:polarssl:0.10.0:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:0.10.1:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:0.11.0:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:0.11.1:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:0.12.0:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:0.12.1:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:0.13.1:*:*:*:*:*:*:*
  • OR cpe:/a:polarssl:polarssl:*:*:*:*:*:*:*:* (Version <= 0.14.0)

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20111923000
    V
    CVE-2011-1923 on Ubuntu 12.04 LTS (precise) - medium.
    2012-06-20
    BACK
    polarssl polarssl 0.10.0
    polarssl polarssl 0.10.1
    polarssl polarssl 0.11.0
    polarssl polarssl 0.11.1
    polarssl polarssl 0.12.0
    polarssl polarssl 0.12.1
    polarssl polarssl 0.13.1
    polarssl polarssl *