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.
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssl | Openssl | 1.0.1 (including) | 1.0.1 (including) |
| Openssl | Openssl | 1.0.1-beta1 (including) | 1.0.1-beta1 (including) |
| Openssl | Openssl | 1.0.1-beta2 (including) | 1.0.1-beta2 (including) |
| Openssl | Openssl | 1.0.1-beta3 (including) | 1.0.1-beta3 (including) |
| Openssl | Openssl | 1.0.1a (including) | 1.0.1a (including) |
| Openssl | Openssl | 1.0.1b (including) | 1.0.1b (including) |
| Openssl | Openssl | 1.0.1c (including) | 1.0.1c (including) |
| Openssl | Openssl | 1.0.1d (including) | 1.0.1d (including) |
| Openssl | Openssl | 1.0.1e (including) | 1.0.1e (including) |
| Openssl | Openssl | 1.0.1f (including) | 1.0.1f (including) |
| Openssl | Openssl | 1.0.1g (including) | 1.0.1g (including) |
| Openssl | Openssl | 1.0.1h (including) | 1.0.1h (including) |
| Openssl | Openssl | 1.0.1i (including) | 1.0.1i (including) |
| Openssl | Openssl | 1.0.1j (including) | 1.0.1j (including) |
| Openssl | Openssl | 1.0.1k (including) | 1.0.1k (including) |
| Openssl | Openssl | 1.0.1l (including) | 1.0.1l (including) |
| Openssl | Openssl | 1.0.1m (including) | 1.0.1m (including) |
| Openssl | Openssl | 1.0.1n (including) | 1.0.1n (including) |
| Openssl | Openssl | 1.0.1o (including) | 1.0.1o (including) |
| Openssl | Openssl | 1.0.1p (including) | 1.0.1p (including) |
| Openssl | Openssl | 1.0.1q (including) | 1.0.1q (including) |
| Openssl | Openssl | 1.0.1r (including) | 1.0.1r (including) |
| Openssl | Openssl | 1.0.2 (including) | 1.0.2 (including) |
| Openssl | Openssl | 1.0.2-beta1 (including) | 1.0.2-beta1 (including) |
| Openssl | Openssl | 1.0.2-beta2 (including) | 1.0.2-beta2 (including) |
| Openssl | Openssl | 1.0.2-beta3 (including) | 1.0.2-beta3 (including) |
| Openssl | Openssl | 1.0.2a (including) | 1.0.2a (including) |
| Openssl | Openssl | 1.0.2b (including) | 1.0.2b (including) |
| Openssl | Openssl | 1.0.2c (including) | 1.0.2c (including) |
| Openssl | Openssl | 1.0.2d (including) | 1.0.2d (including) |
| Openssl | Openssl | 1.0.2e (including) | 1.0.2e (including) |
| Openssl | Openssl | 1.0.2f (including) | 1.0.2f (including) |
| Red Hat Enterprise Linux 6 | RedHat | openssl-0:1.0.1e-42.el6_7.4 | * |
| Red Hat Enterprise Linux 7 | RedHat | openssl-1:1.0.1e-51.el7_2.4 | * |
| Red Hat JBoss Core Services 1 | RedHat | * | |
| RHEV 3.X Hypervisor and Agents for RHEL-6 | RedHat | rhev-hypervisor7-0:7.2-20160302.1.el6ev | * |
| RHEV 3.X Hypervisor and Agents for RHEL-7 | RedHat | rhev-hypervisor7-0:7.2-20160302.1.el7ev | * |
| Openssl | Ubuntu | artful | * |
| Openssl | Ubuntu | bionic | * |
| Openssl | Ubuntu | cosmic | * |
| Openssl | Ubuntu | devel | * |
| Openssl | Ubuntu | disco | * |
| Openssl | Ubuntu | precise | * |
| Openssl | Ubuntu | trusty | * |
| Openssl | Ubuntu | vivid/stable-phone-overlay | * |
| Openssl | Ubuntu | vivid/ubuntu-core | * |
| Openssl | Ubuntu | wily | * |
| Openssl | Ubuntu | xenial | * |
| Openssl | Ubuntu | yakkety | * |
| Openssl | Ubuntu | zesty | * |
| Openssl098 | Ubuntu | precise | * |
| Openssl098 | Ubuntu | trusty | * |
There are many different kinds of mistakes that introduce information exposures. The severity of the error can range widely, depending on the context in which the product operates, the type of sensitive information that is revealed, and the benefits it may provide to an attacker. Some kinds of sensitive information include:
Information might be sensitive to different parties, each of which may have their own expectations for whether the information should be protected. These parties include:
Information exposures can occur in different ways:
It is common practice to describe any loss of confidentiality as an “information exposure,” but this can lead to overuse of CWE-200 in CWE mapping. From the CWE perspective, loss of confidentiality is a technical impact that can arise from dozens of different weaknesses, such as insecure file permissions or out-of-bounds read. CWE-200 and its lower-level descendants are intended to cover the mistakes that occur in behaviors that explicitly manage, store, transfer, or cleanse sensitive information.