CVE-2020-24659

EUVD-2020-17374
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 87%
Affected Products (NVD)
VendorProductVersion
gnugnutls
𝑥
< 3.6.15
opensuseleap
15.1
opensuseleap
15.2
canonicalubuntu_linux
20.04
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
gnutls28
bookworm
3.7.9-2+deb12u3
fixed
bullseye
3.7.1-5+deb11u5
fixed
bullseye (security)
3.7.1-5+deb11u6
fixed
sid
3.8.6-2
fixed
stretch
not-affected
trixie
3.8.6-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gnutls28
bionic
not-affected
focal
Fixed 3.6.13-2ubuntu1.3
released
trusty
dne
xenial
not-affected
Common Weakness Enumeration
References
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
https://gitlab.com/gnutls/gnutls/-/issues/1071
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
https://security.gentoo.org/glsa/202009-01
https://security.netapp.com/advisory/ntap-20200911-0006/
https://usn.ubuntu.com/4491-1/
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
https://gitlab.com/gnutls/gnutls/-/issues/1071
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
https://security.gentoo.org/glsa/202009-01
https://security.netapp.com/advisory/ntap-20200911-0006/
https://usn.ubuntu.com/4491-1/
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04