Vulnerability Details : 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.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-24659
- cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-24659
0.42%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 75 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-24659
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2020-24659
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-24659
-
https://security.netapp.com/advisory/ntap-20200911-0006/
CVE-2020-24659 GnuTLS Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
[SECURITY] Fedora 33 Update: mingw-gnutls-3.6.15-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
[SECURITY] Fedora 32 Update: mingw-gnutls-3.6.15-1.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202009-01
GnuTLS: Denial of service (GLSA 202009-01) — Gentoo securityThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
[security-announce] openSUSE-SU-2020:1724-1: moderate: Security update fMailing List;Third Party Advisory
-
https://usn.ubuntu.com/4491-1/
USN-4491-1: GnuTLS vulnerability | Ubuntu security notices | UbuntuThird Party Advisory
-
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
GnuTLSVendor Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
[security-announce] openSUSE-SU-2020:1743-1: moderate: Security update fMailing List;Third Party Advisory
-
https://gitlab.com/gnutls/gnutls/-/issues/1071
CVE-2020-24659: read-heap-buffer-overflow found by fuzz (#1071) · Issues · gnutls / GnuTLS · GitLabExploit;Issue Tracking;Third Party Advisory
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