THREATPORT/VULNERABILITY/CVE-2017-7526
MEDIUM SEVERITY

CVE-2017-7526

Libgcrypt vulnerability

CVSS
6.1
EPSS
3.9%
EPSS pct
89th
Exploited
No known
libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.
Affected vendor
Gnupg
Affected product
Libgcrypt
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Weakness type (CWE)
Published
2018-07-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 3.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2017-7526

  • Confirm whether Gnupg Libgcrypt is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-7526.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-7526

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-7526 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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