VulnerabilityModified
CVE-2021-4209
This flaw leads to a denial of service after authentication in rare circumstances.
MEDIUM 6.5EPSS 1.75%
Does this matter?
Lower severity and a low EPSS score (1.75%). Track it; it rarely justifies an emergency change on its own.
Description
A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.75% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- gnu/gnutls · redhat/enterprise linux · netapp/active iq unified manager · netapp/solidfire \& hci management node · netapp/hci bootstrap os
- Source
- secalert@redhat.com
References
- https://access.redhat.com/security/cve/CVE-2021-4209Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156Issue Tracking, Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568Patch, Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1306Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220915-0005/Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-4209Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156Issue Tracking, Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568Patch, Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1306Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220915-0005/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.