PT-2020-6565 · Gnutls+7 · Gnutls+7
CVE-2020-24659
·
Published
2020-08-20
·
Updated
2023-02-27
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
GnuTLS versions prior to 3.6.15
Description
The issue is related to a buffer overflow record in the GnuTLS library, which can cause a denial of service. A remote attacker can exploit this by triggering a NULL pointer dereference in a TLS 1.3 client, potentially causing the application to crash. This can happen when a no renegotiation alert is sent with unexpected timing, followed by an invalid second handshake.
Recommendations
For versions prior to 3.6.15, update to version 3.6.15 or later to resolve the issue. As a temporary workaround, consider restricting the use of TLS 1.3 until the update is applied.
Exploit
Fix
Memory Corruption
NULL Pointer Dereference
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Related Identifiers
Affected Products
Alt Linux
Astra Linux
Centos
Gnutls
Linuxmint
Red Hat
Suse
Ubuntu