Vulnerability Monitor

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CVE-2019-13629

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.

Published

2019-10-03T14:15:11.150

Last Modified

2024-11-21T04:25:24.060

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203
CWE-327

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	matrixssl	matrixssl	≤ 4.2.1	Yes

References

http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory ([email protected])
https://eprint.iacr.org/2011/232.pdf Not Applicable ([email protected])
https://minerva.crocs.fi.muni.cz/ Product ([email protected])
https://tches.iacr.org/index.php/TCHES/article/view/7337 Not Applicable ([email protected])
http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://eprint.iacr.org/2011/232.pdf Not Applicable (af854a3a-2127-422b-91ae-364da2661108)
https://minerva.crocs.fi.muni.cz/ Product (af854a3a-2127-422b-91ae-364da2661108)
https://tches.iacr.org/index.php/TCHES/article/view/7337 Not Applicable (af854a3a-2127-422b-91ae-364da2661108)