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OpenSSL Side channel attack on modular exponentiation (CVE-2016-0702)

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OpenSSL Side channel attack on modular exponentiation (CVE-2016-0702)

Severity
2
CVSS
(AV:L/AC:M/Au:N/C:P/I:N/A:N)
Published
03/01/2016
Created
07/25/2018
Added
03/01/2016
Modified
11/27/2024

Description

The MOD_EXP_CTIME_COPY_FROM_PREBUF function in crypto/bn/bn_exp.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not properly consider cache-bank access times during modular exponentiation, which makes it easier for local users to discover RSA keys by running a crafted application on the same Intel Sandy Bridge CPU core as a victim and leveraging cache-bank conflicts, aka a "CacheBleed" attack.

Solution(s)

  • http-openssl-1_0_1-upgrade-1_0_1_s
  • http-openssl-1_0_2-upgrade-1_0_2_g

References

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