CVE-2020-11742
Fixed in a distro release EPSS <1%
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour.
Products: xen, fedoraproject fedora
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.12.2-r1 |
| Alpine 3.11 | xen | 4.13.0-r1 |
| Alpine 3.12 | xen | 4.13.0-r3 |
| Alpine 3.13 | xen | 4.13.0-r3 |
| Alpine 3.14 | xen | 4.13.0-r3 |
| Alpine 3.15 | xen | 4.13.0-r3 |
| Alpine 3.16 | xen | 4.13.0-r3 |
| Alpine 3.17 | xen | 4.13.0-r3 |
| Alpine 3.18 | xen | 4.13.0-r3 |
| Alpine 3.19 | xen | 4.13.0-r3 |
| Alpine 3.20 | xen | 4.13.0-r3 |
| Alpine 3.21 | xen | 4.13.0-r3 |
| Alpine 3.22 | xen | 4.13.0-r3 |
| Alpine 3.23 | xen | 4.13.0-r3 |
| Alpine 3.24 | xen | 4.13.0-r3 |
| Alpine 3.8 | xen | 4.10.4-r3 |
| Alpine 3.9 | xen | 4.11.3-r2 |
| Debian 10 | xen | 4.11.4+24-gddaaccbbab-1~deb10u1 |
| Debian 12 | xen | 4.11.4-1 |
| Debian 13 | xen | 4.11.4-1 |
| Debian 14 | xen | 4.11.4-1 |
| SUSE Enterprise Storage 5 | xen | 4.9.4_06-3.62.1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_06-3.62.1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | xen | 4.10.4_10-3.31.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | xen | 4.10.4_10-3.31.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | 4.12.2_04-3.15.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | 4.12.2_04-3.15.1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_22-45.36.1 |
| SUSE Linux Enterprise Server 11 SP4-LTSS | xen | 4.4.4_42-61.52.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | 4.7.6_08-43.64.1 |
| SUSE Linux Enterprise Server 12 SP2-LTSS | xen | 4.7.6_08-43.64.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | 4.9.4_06-3.62.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | 4.9.4_06-3.62.1 |
| SUSE Linux Enterprise Server 12 SP4 | xen | 4.11.3_04-2.23.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.2_04-3.11.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | 4.7.6_08-43.64.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.4_06-3.62.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.3_04-2.23.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.2_04-3.11.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | 4.10.4_10-3.31.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | xen | 4.11.3_04-2.23.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.2_04-3.11.1 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_08-43.64.1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_06-3.62.1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_06-3.62.1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |
| Ubuntu 20.04 LTS | xen | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 |
| openSUSE Leap 15.1 | xen | 4.12.2_04-lp151.2.15.1 |
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 |