Vulnerability Name:

CVE-2018-12437 (CCN-144865)

Assigned:2018-06-13
Published:2018-06-13
Updated:2021-06-29
Summary:LibTomCrypt through 1.18.1 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:4.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N)
4.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Physical
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
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:U/RC:R)
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-2018-12437

Source: XF
Type: UNKNOWN
libtomcrypt-cve201812437-info-disc(144865)

Source: CCN
Type: libtomcrypt GIT Repository
libtomcrypt

Source: GENTOO
Type: Third Party Advisory
GLSA-202007-53

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

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

Vulnerable Configuration:Configuration 1:
  • cpe:/a:libtom:libtomcrypt:*:*:*:*:*:*:*:* (Version <= 1.18.1)

    • Configuration 2:
  • cpe:/o:linaro:op-tee:*:*:*:*:*:*:*:* (Version <= 3.5.0)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112878
    P
    		libtomcrypt-devel-1.18.2-2.10 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106338
    P
    		libtomcrypt-devel-1.18.2-2.10 on GA media (Moderate)
    2021-10-01
    oval:com.ubuntu.bionic:def:2018124370000000
    V
    		CVE-2018-12437 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-06-15
    oval:com.ubuntu.xenial:def:2018124370000000
    V
    		CVE-2018-12437 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-06-15
    oval:com.ubuntu.artful:def:201812437000
    V
    		CVE-2018-12437 on Ubuntu 17.10 (artful) - medium.
    2018-06-14
    oval:com.ubuntu.bionic:def:201812437000
    V
    		CVE-2018-12437 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-06-14
    oval:com.ubuntu.trusty:def:201812437000
    V
    		CVE-2018-12437 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-06-14
    oval:com.ubuntu.xenial:def:201812437000
    V
    		CVE-2018-12437 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-06-14
    BACK
    libtom libtomcrypt *
    linaro op-tee *