CVE-2021-4209
Severity
6.5MEDIUM
EPSS
0.3%
top 43.08%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedAug 24
Latest updateNov 30
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6
Affected Packages4 packages
Also affects: Enterprise Linux 8.0
Patches
🔴Vulnerability Details
4📋Vendor Advisories
5Microsoft▶
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 s↗2022-08-09
Debian▶
CVE-2021-4209: gnutls28 - A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update fun...↗2021