Vulnerability Monitor

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CVE-2018-12435

Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Published

2018-06-15T02:29:00.377

Last Modified

2024-11-21T03:45:12.927

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.9 (MEDIUM)

CVSSv2 Vector

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

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

Exploitability Score

3.4

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	botan_project	botan	≤ 2.7.0	Yes

References

https://botan.randombit.net/security.html Third Party Advisory ([email protected])
https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3 Patch, Third Party Advisory ([email protected])
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Exploit, Third Party Advisory ([email protected])
https://botan.randombit.net/security.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)