Vulnerability CVE-2018-12433


Published: 2018-06-14   Modified: 2018-06-15

Description:
** DISPUTED ** cryptlib through 3.4.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. NOTE: the vendor does not include side-channel attacks within its threat model.

Type:

CWE-320

(Key Management Errors)

CVSS2 => (AV:L/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
1.9/10
2.9/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Wolfssl -> Wolfcrypt 
Openssl -> Openssl 
Openbsd -> Libressl 
Mozilla -> Network security services 
Matrixssl -> Matrixssl 
Libtom -> Libtomcrypt 
Libsunec project -> Libsunec 
Google -> Boringssl 
Gnupg -> Libgcrypt 
Cryptlib -> Cryptlib 
Botan project -> Botan 

 References:
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/

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