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CVE-2016-0702· NVD / CVE Program· CNA redhat

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 c

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.

MediumCVSS 5.1 · v3.1—Proof of concept Fix available
Published
Mar 3, 2016
Updated
Jun 16, 2026
EPSS
1.9% · 79th percentile
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Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
20 / 40 · 5.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.9%

Affected systems

VendorProduct
opensslopenssl
nodejsnode.js
debiandebian linux
canonicalubuntu linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • nodejs node.js4.0.0 and later · up to 4.1.2 inclusive
  • nodejs node.js4.2.0 and later · before 4.3.2
  • nodejs node.js5.0.0 and later · before 5.7.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12opensslbefore 1.0.2g-11.0.2g-1
Debian:7opensslbefore 1.0.1e-2+deb7u201.0.1e-2+deb7u20
Debian:8opensslbefore 1.0.1k-3+deb8u41.0.1k-3+deb8u4
Red Hat:enterprise_linux:6::clientopensslbefore 0:1.0.1e-42.el6_7.40:1.0.1e-42.el6_7.4
Red Hat:enterprise_linux:6::clientopenssl-debuginfobefore 0:1.0.1e-42.el6_7.40:1.0.1e-42.el6_7.4
Red Hat:enterprise_linux:6::clientopenssl-develbefore 0:1.0.1e-42.el6_7.40:1.0.1e-42.el6_7.4
Red Hat:enterprise_linux:6::clientopenssl-perlbefore 0:1.0.1e-42.el6_7.40:1.0.1e-42.el6_7.4
Red Hat:enterprise_linux:6::clientopenssl-staticbefore 0:1.0.1e-42.el6_7.40:1.0.1e-42.el6_7.4
Red Hat:enterprise_linux:6::hypervisorrhev-hypervisor7before 0:7.2-20160302.1.el6ev0:7.2-20160302.1.el6ev
Red Hat:enterprise_linux:7::clientopensslbefore 1:1.0.1e-51.el7_2.41:1.0.1e-51.el7_2.4
Red Hat:enterprise_linux:7::clientopenssl-debuginfobefore 1:1.0.1e-51.el7_2.41:1.0.1e-51.el7_2.4
Red Hat:enterprise_linux:7::clientopenssl-develbefore 1:1.0.1e-51.el7_2.41:1.0.1e-51.el7_2.4
Red Hat:enterprise_linux:7::clientopenssl-libsbefore 1:1.0.1e-51.el7_2.41:1.0.1e-51.el7_2.4
Red Hat:enterprise_linux:7::clientopenssl-perlbefore 1:1.0.1e-51.el7_2.41:1.0.1e-51.el7_2.4
Red Hat:enterprise_linux:7::clientopenssl-staticbefore 1:1.0.1e-51.el7_2.41:1.0.1e-51.el7_2.4
Red Hat:enterprise_linux:7::hypervisorrhev-hypervisor7before 0:7.2-20160302.1.el7ev0:7.2-20160302.1.el7ev
SUSE:Linux Enterprise Desktop 11 SP4compat-openssl097gbefore 0.9.7g-146.22.41.10.9.7g-146.22.41.1
SUSE:Linux Enterprise Desktop 12compat-openssl098before 0.9.8j-94.10.9.8j-94.1
SUSE:Linux Enterprise Desktop 12compat-openssl098before 0.9.8j-97.10.9.8j-97.1
SUSE:Linux Enterprise Desktop 12opensslbefore 1.0.1i-27.13.11.0.1i-27.13.1
SUSE:Linux Enterprise Desktop 12 SP1opensslbefore 1.0.1i-44.11.0.1i-44.1
SUSE:Linux Enterprise Server 11-SECURITYopenssl1before 1.0.1g-0.40.11.0.1g-0.40.1
SUSE:Linux Enterprise Software Development Kit 11 SP4opensslbefore 0.9.8j-0.97.10.9.8j-0.97.1
SUSE:Linux Enterprise Software Development Kit 11 SP4opensslbefore 0.9.8j-0.89.10.9.8j-0.89.1

+1

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    90Now
  • CVE-2021-3711SM2 Decryption Buffer Overflow
    65This week
  • CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code
    65This week
  • CVE-2016-2108The ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to execute arbitrary code or cause a denia
    62This week
  • CVE-2016-6309statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a den
    60This week
  • CVE-2022-3786X.509 Email Address Variable Length Buffer Overflow
    58Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:openssl1.0.2g-1 · Debian:12Package registry (OSV)
red hat:openssl0:1.0.1e-42.el6_7.4 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-debuginfo0:1.0.1e-42.el6_7.4 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-devel0:1.0.1e-42.el6_7.4 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-libs1:1.0.1e-51.el7_2.4 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-perl0:1.0.1e-42.el6_7.4 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-static0:1.0.1e-42.el6_7.4 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:rhev-hypervisor70:7.2-20160302.1.el6ev · Red Hat:enterprise_linux:6::hypervisorPackage registry (OSV)
suse:compat-openssl097g0.9.7g-146.22.41.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)
suse:compat-openssl0980.9.8j-94.1 · SUSE:Linux Enterprise Desktop 12Package registry (OSV)
suse:openssl1.0.1i-27.13.1 · SUSE:Linux Enterprise Desktop 12Package registry (OSV)
suse:openssl11.0.1g-0.40.1 · SUSE:Linux Enterprise Server 11-SECURITYPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02023-11-09

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+2806 d
  3. TodaySep 30, 2026+3863 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

All records