CVE-2016-0702

LOW

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.

References

http://cachebleed.info

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759

http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178358.html

http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178817.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00005.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00012.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00025.html

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00017.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00018.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00029.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00030.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00036.html

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00055.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00019.html

http://marc.info/?l=bugtraq&m=145889460330120&w=2

http://openssl.org/news/secadv/20160301.txt

http://rhn.redhat.com/errata/RHSA-2016-2957.html

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl

http://www.debian.org/security/2016/dsa-3500

http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html

http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html

http://www.securitytracker.com/id/1035133

http://www.ubuntu.com/usn/USN-2914-1

https://git.openssl.org/?p=openssl.git;a=commit;h=708dc2f1291e104fe4eef810bb8ffc1fae5b19c1

https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05052990

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168

https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc

https://security.gentoo.org/glsa/201603-15

https://www.openssl.org/news/secadv/20160301.txt

Details

Source: MITRE

Published: 2016-03-03

Updated: 2018-01-05

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3.0

Base Score: 5.1

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1.4

Severity: MEDIUM