It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later which can be triggered by certain post-handshake messages.
Weakness
The product does not initialize critical variables, which causes the execution environment to use unexpected values.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gnutls | Gnu | 3.6.3 (including) | 3.6.7 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | gnutls-0:3.6.8-8.el8 | * |
| Red Hat Enterprise Linux 8 | RedHat | gnutls-0:3.6.8-8.el8 | * |
| Gnutls28 | Ubuntu | cosmic | * |
| Gnutls28 | Ubuntu | disco | * |
| Gnutls28 | Ubuntu | upstream | * |
Potential Mitigations
References
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html
- https://access.redhat.com/errata/RHSA-2019:3600
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3836
- https://gitlab.com/gnutls/gnutls/issues/704
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3ETBUFBB4G7AITAOUYPGXVMBGVXKUAN/
- https://security.gentoo.org/glsa/201904-14
- https://security.netapp.com/advisory/ntap-20190502-0005/
- https://usn.ubuntu.com/3999-1/
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html
- https://access.redhat.com/errata/RHSA-2019:3600
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3836
- https://gitlab.com/gnutls/gnutls/issues/704
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3ETBUFBB4G7AITAOUYPGXVMBGVXKUAN/
- https://security.gentoo.org/glsa/201904-14
- https://security.netapp.com/advisory/ntap-20190502-0005/
- https://usn.ubuntu.com/3999-1/