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CVE-2018-0495

UnknownEPSS 0.89%

Last modified

CVE-2018-0495 is a vulnerability of currently unknown severity. Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, 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.. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

Description

Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, 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.

Metrics

EPSS Probability
0.89%

54.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GnupgLibgcrypt< 1.7.10
GnupgLibgcrypt>= 1.8.0, < 1.8.3
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux17.10
CanonicalUbuntu Linux18.04
CanonicalUbuntu Linux18.10
DebianDebian Linux8.0
DebianDebian Linux9.0
RedhatAnsible Tower3.3
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Workstation7.0
OracleTraffic Director11.1.1.9.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-0495?
Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, 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.
How severe is CVE-2018-0495?
Severity scoring for CVE-2018-0495 is pending analysis. The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.
How do I fix CVE-2018-0495?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0495?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST