Security Vulnerabilities - CVEs Published In May 2021
A flaw was found in Ansible Tower when running Openshift. Tower runs a memcached, which is accessed via TCP. An attacker can take advantage of writing a playbook polluting this cache, causing a denial of service attack. This attack would not completely stop the service, but in the worst-case scenario, it can reduce the Tower performance, for which memcached is designed. Theoretically, more sophisticated attacks can be performed by manipulating and crafting the cache, as Tower relies on memcached as a place to pull out setting values. Confidential and sensitive data stored in memcached should not be pulled, as this information is encrypted. This flaw affects Ansible Tower versions before 3.6.4, Ansible Tower versions before 3.5.6 and Ansible Tower versions before 3.4.6.
CVSS Score
4.4
EPSS Score
0.001
Published
2021-05-27
A flaw was found in Ansible Tower when running jobs. This flaw allows an attacker to access the stdout of the executed jobs which are run from other organizations. Some sensible data can be disclosed. However, critical data should not be disclosed, as it should be protected by the no_log flag when debugging is enabled. This flaw affects Ansible Tower versions before 3.6.4, Ansible Tower versions before 3.5.6 and Ansible Tower versions before 3.4.6.
CVSS Score
3.3
EPSS Score
0.0
Published
2021-05-27
A missing authorization flaw was found in the libvirt API responsible for changing the QEMU agent response timeout. This flaw allows read-only connections to adjust the time that libvirt waits for the QEMU guest agent to respond to agent commands. Depending on the timeout value that is set, this flaw can make guest agent commands fail because the agent cannot respond in time. Unprivileged users with a read-only connection could abuse this flaw to set the response timeout for all guest agent messages to zero, potentially leading to a denial of service. This flaw affects libvirt versions before 6.2.0.
CVSS Score
6.5
EPSS Score
0.003
Published
2021-05-27
A security flaw was found in Ansible Tower when requesting an OAuth2 token with an OAuth2 application. Ansible Tower uses the token to provide authentication. This flaw allows an attacker to obtain a refresh token that does not expire. The original token granted to the user still has access to Ansible Tower, which allows any user that can gain access to the token to be fully authenticated to Ansible Tower. This flaw affects Ansible Tower versions before 3.6.4 and Ansible Tower versions before 3.5.6.
CVSS Score
7.1
EPSS Score
0.001
Published
2021-05-27
A flaw was found in Red Hat Satellite's Job Invocation, where the "User Input" entry was not properly restricted to the view. This flaw allows a malicious Satellite user to scan through the Job Invocation, with the ability to search for passwords and other sensitive data. This flaw affects tfm-rubygem-foreman_ansible versions before 4.0.3.4.
CVSS Score
6.5
EPSS Score
0.002
Published
2021-05-27
A flaw was found in the use of insufficiently random values in Ansible. Two random password lookups of the same length generate the equal value as the template caching action for the same file since no re-evaluation happens. The highest threat from this vulnerability would be that all passwords are exposed at once for the file. This flaw affects Ansible Engine versions before 2.9.6.
CVSS Score
5.5
EPSS Score
0.001
Published
2021-05-27
A memory disclosure flaw was found in the Linux kernel's versions before 4.18.0-193.el8 in the sysctl subsystem when reading the /proc/sys/kernel/rh_features file. This flaw allows a local user to read uninitialized values from the kernel memory. The highest threat from this vulnerability is to confidentiality.
CVSS Score
5.5
EPSS Score
0.0
Published
2021-05-27
A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.
CVSS Score
9.1
EPSS Score
0.002
Published
2021-05-27
A heap-based Buffer Overflow vulnerability in FFmpeg 4.2 at libavcodec/get_bits.h when writing .mov files, which might lead to memory corruption and other potential consequences.
CVSS Score
8.8
EPSS Score
0.01
Published
2021-05-27
A heap-based Buffer Overflow vulnerability exists in FFmpeg 4.2 at libavfilter/vf_colorconstancy.c: in slice_get_derivative, which crossfade_samples_fltp, which might lead to memory corruption and other potential consequences.
CVSS Score
8.8
EPSS Score
0.007
Published
2021-05-27