vulnwire
5.9med

CVE-2017-9526

In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easi…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
5.9
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
2.3%
percentile 84%
Public exploits
0
none known

In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.

Exploit prediction (EPSS)

2.32% probability of exploitation in the next 30 days, higher than 84% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.05.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD2.04.3AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

  • oracle.com /technetwork/security-advisory/cpujul2018-4258247.html · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpujan2019-5072801.html · x_refsource_CONFIRM, x_transferred
  • git.gnupg.org /cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=5a22de904a0a366ae79f03ff1e13a1232a89e26 · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-3880 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • securityfocus.com /bid/99046 · vdb-entry, x_refsource_BID, x_transferred
  • git.gnupg.org /cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=f9494b3f258e01b6af8bd3941ce436bcc00afc5 · x_refsource_CONFIRM, x_transferred
  • bugzilla.suse.com /show_bug.cgi?id=1042326 · x_refsource_CONFIRM, x_transferred

Sources

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