A NULL pointer dereference in sanei_epson_net_read in SANE Backends before 1.0.30 allows a malicious device connected to the same local network as the victim to cause a denial of service, aka GHSL-2020-075.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Sane_backends | Sane-project | * | 1.0.30 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | sane-backends-0:1.0.27-22.el8 | * |
| Sane-backends | Ubuntu | bionic | * |
| Sane-backends | Ubuntu | eoan | * |
| Sane-backends | Ubuntu | esm-infra/bionic | * |
| Sane-backends | Ubuntu | esm-infra/focal | * |
| Sane-backends | Ubuntu | esm-infra/xenial | * |
| Sane-backends | Ubuntu | focal | * |
| Sane-backends | Ubuntu | trusty | * |
| Sane-backends | Ubuntu | upstream | * |
| Sane-backends | Ubuntu | xenial | * |
Potential Mitigations
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00079.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00003.html
- https://alioth-lists.debian.net/pipermail/sane-announce/2020/000041.html
- https://gitlab.com/sane-project/backends/-/issues/279#issue-1-ghsl-2020-075-null-pointer-dereference-in-sanei_epson_net_read
- https://lists.debian.org/debian-lts-announce/2020/08/msg00029.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00010.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWUVCHURVGGYBEUOBA4PLSNXJVBKHJYJ/
- https://securitylab.github.com/advisories/GHSL-2020-075-libsane
- https://usn.ubuntu.com/4470-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00079.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00003.html
- https://alioth-lists.debian.net/pipermail/sane-announce/2020/000041.html
- https://gitlab.com/sane-project/backends/-/issues/279#issue-1-ghsl-2020-075-null-pointer-dereference-in-sanei_epson_net_read
- https://lists.debian.org/debian-lts-announce/2020/08/msg00029.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00010.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWUVCHURVGGYBEUOBA4PLSNXJVBKHJYJ/
- https://securitylab.github.com/advisories/GHSL-2020-075-libsane
- https://usn.ubuntu.com/4470-1/