CVSS: 7.1EPSS: 0%CPEs: 1EXPL: 2CVE-2021-32847 – Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx
https://notcve.org/view.php?id=CVE-2021-32847
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior, a malicious guest can trigger a vulnerability in the host by abusing the disk driver that may lead to the disclosure of the host memory into the virtualized guest. This issue is fixed in commit cf60095a4d8c3cb2e182a14415467afd356e982f. • https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316 https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit • CWE-125: Out-of-bounds Read •
CVSS: 6.2EPSS: 0%CPEs: 1EXPL: 0CVE-2021-32844
https://notcve.org/view.php?id=CVE-2021-32844
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13. • https://github.com/moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13 https://github.com/moby/hyperkit/pull/313 https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit • CWE-476: NULL Pointer Dereference •
CVSS: 6.2EPSS: 0%CPEs: 1EXPL: 0CVE-2021-32843
https://notcve.org/view.php?id=CVE-2021-32843
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, `virtio.c` has is a call to `vc_cfgread` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4. • https://github.com/moby/hyperkit/commit/df0e46c7dbfd81a957d85e449ba41b52f6f7beb4 https://github.com/moby/hyperkit/pull/313 https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit • CWE-476: NULL Pointer Dereference •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2021-32846 – Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx
https://notcve.org/view.php?id=CVE-2021-32846
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. • https://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebaba https://github.com/moby/hyperkit/pull/313 https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit • CWE-754: Improper Check for Unusual or Exceptional Conditions CWE-908: Use of Uninitialized Resource •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2021-32845 – Moby HyperKit uninitialized memory use vtrnd pci_vtrnd_notify
https://notcve.org/view.php?id=CVE-2021-32845
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, the implementation of `qnotify` at `pci_vtrnd_notify` fails to check the return value of `vq_getchain`. This leads to `struct iovec iov;` being uninitialized and used to read memory in `len = (int) read(sc->vrsc_fd, iov.iov_base, iov.iov_len);` when an attacker is able to make `vq_getchain` fail. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit 41272a980197917df8e58ff90642d14dec8fe948. • https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948 https://github.com/moby/hyperkit/pull/313 https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit • CWE-252: Unchecked Return Value CWE-908: Use of Uninitialized Resource •