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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 1.0.2g-1 | — |
| Debian 13 | openssl | 1.0.2g-1 | — |
| Debian 12 | openssl | 1.0.2g-1 | — |
| Debian 8 | openssl | 1.0.1k-3+deb8u4 | DSA-3500-1 |
| Debian 7 | openssl | 1.0.1e-2+deb7u20 | DSA-3500-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu2 | — |
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.18 | USN-2914-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.1e-51.el7_2.4 | RHSA-2016:0301 |
| RHEL 7 | rhev-hypervisor7 | 7.2-20160302.1.el7ev | RHSA-2016:0379 |
| RHEL 6 | openssl +3 | 1.0.1e-42.el6_7.4 | RHSA-2016:0301 |
| RHEL 6 | rhev-hypervisor7 | 7.2-20160302.1.el6ev | RHSA-2016:0379 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | compat-openssl098 | 0.9.8j-94.1 | SUSE-SU-2016:1267-1, SUSE-SU-2016:0641-1 |
| SLES 12 SP1 | openssl | 1.0.1i-44.1 | SUSE-SU-2016:0620-1 |
| SLES 12 | compat-openssl098 | 0.9.8j-94.1 | SUSE-SU-2016:1267-1, SUSE-SU-2016:0641-1 |
| SLES 12 | openssl | 1.0.1i-27.13.1 | SUSE-SU-2016:0617-1 |
| SLES 11 SP4 | compat-openssl097g | 0.9.7g-146.22.41.1 | SUSE-SU-2016:0631-1 |
| SLES 11 SP4 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:0624-1 |
| SLES 11 SP3 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:0624-1 |
| SLES 11 SP2 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:0624-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 | openssl1 | 1.0.1g-0.40.1 | SUSE-SU-2016:0621-1 |
| SUSE Studio Onsite 1.3 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:0624-1 |
| SLES for SAP 12 SP1 | compat-openssl098 | 0.9.8j-94.1 | SUSE-SU-2016:1267-1, SUSE-SU-2016:0641-1 |
| SLES for SAP 12 SP1 | openssl | 1.0.1i-44.1 | SUSE-SU-2016:0620-1 |
| SLES for SAP 12 | openssl | 1.0.1i-27.13.1 | SUSE-SU-2016:0617-1 |
| SLES for SAP 11 SP4 | compat-openssl097g | 0.9.7g-146.22.41.1 | SUSE-SU-2016:0631-1 |
| SLES for SAP 11 SP4 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:0624-1 |
| SUSE OpenStack Cloud 5 | openssl | 0.9.8j-0.91.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:1057-1 |
| SUSE Manager Proxy 2.1 | openssl | 0.9.8j-0.91.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:1057-1 |
| SUSE Manager 2.1 | openssl | 0.9.8j-0.91.1 | SUSE-SU-2016:1290-1, SUSE-SU-2016:1057-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libressl | 2.5.0-1.1 | openSUSE-SU-2024:10309-1 |
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openssl +4 | 1:1.0.1e-51.el7_2.4 | ELSA-2016-0301 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
Trinadh465/OpenSSL-1_0_1g_CVE-2016-0702 ★ 0 · Nov 9, 2023
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 20
- RHSA-2016:0379 Red Hat Security Advisory: rhev-hypervisor security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2016:0301 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-2914-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3500-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10309-1 libcrypto38-2.5.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1267-1 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0621-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0641-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1057-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1290-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0617-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0620-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0624-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0427 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2025
- openSUSE-SU-2024:11127-1 libopenssl-1_1-devel-1.1.1l-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2016:0631-1 Security update for compat-openssl097g SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1594 IBM Tivoli Network Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 28, 2023
- ICSA-22-349-21 Siemens SCALANCE X-200RNA Switch Devices CISA ICS & IT advisories · Dec 13, 2022
- SSA-412672 SSA-412672: Multiple OpenSSL and OpenSSH Vulnerabilities in SCALANCE X-200RNA Switch Devices before V3.2.7 Siemens ProductCERT · Dec 13, 2022
- ELSA-2016-0301 Important: openssl security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 1, 2016
References
- FEDORA-2016-2802690366 vendor-advisory
- openSUSE-SU-2016:1242 vendor-advisory
- SUSE-SU-2016:1267 vendor-advisory
- FEDORA-2016-e6807b3394 vendor-advisory
- openSUSE-SU-2016:0638 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917
- FreeBSD-SA-16:12 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- openSUSE-SU-2016:1239 vendor-advisory
- SUSE-SU-2016:0621 vendor-advisory
- HPSBGN03563 vendor-advisory
- USN-2914-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- SUSE-SU-2016:1057 vendor-advisory
- openSUSE-SU-2016:1566 vendor-advisory
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168
- openSUSE-SU-2016:1241 vendor-advisory
- http://openssl.org/news/secadv/20160301.txt
- SUSE-SU-2016:1360 vendor-advisory
- 20160302 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2016 vendor-advisory
- openSUSE-SU-2016:0720 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
- SUSE-SU-2016:0624 vendor-advisory
- DSA-3500 vendor-advisory
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us
- SUSE-SU-2016:0631 vendor-advisory
- https://www.openssl.org/news/secadv/20160301.txt
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
- SUSE-SU-2016:0617 vendor-advisory
- SUSE-SU-2016:1290 vendor-advisory
- openSUSE-SU-2016:1273 vendor-advisory
- RHSA-2016:2957 vendor-advisory
- GLSA-201603-15 vendor-advisory
- openSUSE-SU-2016:0628 vendor-advisory
- 1035133 vdb-entry
- http://cachebleed.info
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=708dc2f1291e104fe4eef810bb8ffc1fae5b19c1
- SUSE-SU-2016:0620 vendor-advisory
- openSUSE-SU-2016:0637 vendor-advisory
- openSUSE-SU-2016:0627 vendor-advisory
- SUSE-SU-2016:0641 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05052990
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf