VDB
RHSA-2021%3A3653
RHSA-2021%3A3653
PUBLISHED
CVSS 8.100000381469727 HIGH
A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in certain circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Risk Scores
CVSS 3.1
8.100000381469727
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | rhacm2/acm-must-gather-rhel8@sha256:19f9e374bbf3621b51a37ec23aaf88651c68321644984e27ea277e364d8a7712_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.1 for RHEL 8 | rhacm2/acm-must-gather-rhel8@sha256:19f9e374bbf3621b51a37ec23aaf88651c68321644984e27ea277e364d8a7712_amd64 |
Timeline
- Sep 23, 2021 CVE Published
- Jan 13, 2026 CVE Updated
- May 1, 2026 Distribution Patch
- May 1, 2026 Distribution Patch
- May 1, 2026 Security Advisory
- May 1, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2021:3653 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1963121 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=1999375 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3653.json advisory
- https://access.redhat.com/security/cve/CVE-2021-23017 advisory
- https://www.cve.org/CVERecord?id=CVE-2021-23017 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-23017 advisory