Vulnerability Name:

CVE-2018-12436 (CCN-144864)

Assigned:2018-06-13
Published:2018-06-13
Updated:2018-08-06
Summary:wolfcrypt/src/ecc.c in wolfSSL before 3.15.1.patch allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
CVSS v3 Severity:4.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
5.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
4.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:1.9 Low (CVSS v2 Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.0 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-200
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2018-12436

Source: XF
Type: UNKNOWN
wolfssl-cve201812436-info-disc(144864)

Source: CCN
Type: wolfssl GIT Repository
Change ECDSA signing to use blinding.

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/wolfSSL/wolfssl/commit/9b9568d500f31f964af26ba8d01e542e1f27e5ca

Source: CCN
Type: nccgroup Web site
Technical Advisory: "ROHNP"- Key Extraction Side Channel in Multiple Crypto Libraries

Source: MISC
Type: Third Party Advisory
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/

Source: MISC
Type: Vendor Advisory
https://www.wolfssl.com/wolfssh-and-rohnp/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:wolfssl:wolfssl:*:*:*:*:*:*:*:* (Version < 3.15.3)

    • Configuration CCN 1:
  • cpe:/a:wolfssl:wolfssl:3.15.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:2018124360000000
    V
    		CVE-2018-12436 on Ubuntu 19.04 (disco) - medium.
    2018-06-15
    oval:com.ubuntu.bionic:def:2018124360000000
    V
    		CVE-2018-12436 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-06-15
    oval:com.ubuntu.xenial:def:2018124360000000
    V
    		CVE-2018-12436 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-06-15
    oval:com.ubuntu.artful:def:201812436000
    V
    		CVE-2018-12436 on Ubuntu 17.10 (artful) - medium.
    2018-06-14
    oval:com.ubuntu.cosmic:def:2018124360000000
    V
    		CVE-2018-12436 on Ubuntu 18.10 (cosmic) - medium.
    2018-06-14
    oval:com.ubuntu.bionic:def:201812436000
    V
    		CVE-2018-12436 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-06-14
    oval:com.ubuntu.cosmic:def:201812436000
    V
    		CVE-2018-12436 on Ubuntu 18.10 (cosmic) - medium.
    2018-06-14
    oval:com.ubuntu.xenial:def:201812436000
    V
    		CVE-2018-12436 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-06-14
    BACK
    wolfssl wolfssl *
    wolfssl wolfssl 3.15.0