NULL pointer dereference vulnerability in the rebuild_vlists function in lib/dotgen/conc.c in the dotgen library in Graphviz 2.40.1 allows remote attackers to cause a denial of service (application crash) via a crafted file.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Graphviz | Graphviz | 2.40.1 (including) | 2.40.1 (including) |
| Graphviz | Ubuntu | artful | * |
| Graphviz | Ubuntu | bionic | * |
| Graphviz | Ubuntu | cosmic | * |
| Graphviz | Ubuntu | esm-apps/bionic | * |
| Graphviz | Ubuntu | esm-infra-legacy/trusty | * |
| Graphviz | Ubuntu | esm-infra/xenial | * |
| Graphviz | Ubuntu | trusty | * |
| Graphviz | Ubuntu | trusty/esm | * |
| Graphviz | Ubuntu | upstream | * |
| Graphviz | Ubuntu | xenial | * |
Potential Mitigations
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1579254
- https://gitlab.com/graphviz/graphviz/issues/1367
- https://lists.debian.org/debian-lts-announce/2021/05/msg00014.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N6VR2CT3LD52GWAQUZAOSEXSYE3O7HGN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TWUEEJPMS5LAROYJYY6FREOTI6VPN3M4/
- https://usn.ubuntu.com/3731-1/
- https://bugzilla.redhat.com/show_bug.cgi?id=1579254
- https://gitlab.com/graphviz/graphviz/issues/1367
- https://lists.debian.org/debian-lts-announce/2021/05/msg00014.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N6VR2CT3LD52GWAQUZAOSEXSYE3O7HGN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TWUEEJPMS5LAROYJYY6FREOTI6VPN3M4/
- https://usn.ubuntu.com/3731-1/