Vulnerability Name:

CVE-2019-13629 (CCN-169668)

Assigned:2019-10-02
Published:2019-10-02
Updated:2021-07-21
Summary:MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This allows a local or a remote attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used. The issue occurs because crypto/pubkey/ecc_math.c scalar multiplication leaks the bit length of the scalar.
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/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): Network
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
5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
5.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/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): Network
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:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
5.4 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-327
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2019-13629

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20191002 Minerva: ECDSA key recovery from bit-length leakage

Source: MISC
Type: Not Applicable
https://eprint.iacr.org/2011/232.pdf

Source: XF
Type: UNKNOWN
matrixssl-cve201913629-info-disc(169668)

Source: CCN
Type: matrixssl GIT Repository
MatrixSSL

Source: MISC
Type: Product
https://minerva.crocs.fi.muni.cz/

Source: MISC
Type: Not Applicable
https://tches.iacr.org/index.php/TCHES/article/view/7337

Source: CCN
Type: oss-sec Mailing List, Wed, 2 Oct 2019 23:00:22 +0200
Minerva: ECDSA key recovery from bit-length leakage

Vulnerable Configuration:Configuration 1:
  • cpe:/a:matrixssl:matrixssl:*:*:*:*:*:*:*:* (Version <= 4.2.1)

    • Configuration CCN 1:
  • cpe:/a:matrixssl:matrixssl:4.2.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    matrixssl matrixssl *
    matrixssl matrixssl 4.2.1