vulnwire
4.0med

CVE-2017-11671

Under certain circumstances, the ix86_expand_builtin function in i386.c in GNU Compiler Collection (GCC) version 4.6, 4.7, 4.8, 4.9, 5 befo…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
4.0
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
0.5%
percentile 41%
Public exploits
0
none known

Under certain circumstances, the ix86_expand_builtin function in i386.c in GNU Compiler Collection (GCC) version 4.6, 4.7, 4.8, 4.9, 5 before 5.5, and 6 before 6.4 will generate instruction sequences that clobber the status flag of the RDRAND and RDSEED intrinsics before it can be read, potentially causing failures of these instructions to go unreported. This could potentially lead to less randomness in random number generation.

Exploit prediction (EPSS)

0.47% probability of exploitation in the next 30 days, higher than 41% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.04.0CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD2.02.1AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

  • openwall.com /lists/oss-security/2017/07/27/2 · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/100018 · vdb-entry, x_refsource_BID, x_transferred
  • access.redhat.com /errata/RHSA-2018:0849 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • gcc.gnu.org /bugzilla/show_bug.cgi?id=80180 · x_refsource_CONFIRM, x_transferred
  • gcc.gnu.org /ml/gcc-patches/2017-03/msg01349.html · x_refsource_CONFIRM, x_transferred

Sources

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