CVE Vulnerability

CVE-2020-24659

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://gitlab.com/gnutls/gnutls/-/issues/1071 Exploit Third Party Advisory
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04 Vendor Advisory
https://security.gentoo.org/glsa/202009-01 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200911-0006/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/ Third Party Advisory
https://usn.ubuntu.com/4491-1/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
Configurations

Configuration 1

cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Information

Published : 2020-09-04 03:15

Updated : 2020-10-26 04:15

NVD link : CVE-2020-24659

Mitre link : CVE-2020-24659

Products Affected
No products.
CWE
CWE-476

CWE-787