Description
The hidden-service feature in Tor before 0.3.0.8 allows a denial of service (assertion failure and daemon exit) in the connection_edge_process_relay_cell function via a BEGIN_DIR cell on a rendezvous circuit.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Tor before 0.3.0.8 | Tor before 0.3.0.8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tor | 0.2.9.11-1 | — |
| Debian 13 | tor | 0.2.9.11-1 | — |
| Debian 12 | tor | 0.2.9.11-1 | — |
| Debian 9 | tor | 0.2.9.11-1~deb9u1 | DSA-3877-1 |
| Debian 8 | tor | 0.2.5.14-1 | DSA-3877-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | tor | 0.2.4.29-1 | DLA-982-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | tor | 0.2.4.27-1ubuntu0.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tor | 0.4.6.7-2.2 | openSUSE-SU-2024:11469-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tor | 0.3.0.8-r0 | — |
| Alpine v3.23 | tor | 0.3.0.8-r0 | — |
| Alpine v3.22 | tor | 0.3.0.8-r0 | — |
| Alpine v3.21 | tor | 0.3.0.8-r0 | — |
| Alpine v3.20 | tor | 0.3.0.8-r0 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | tor | 0.3.0.8-r0 | — |
| Alpine v3.18 | tor | 0.3.0.8-r0 | — |
| Alpine v3.17 | tor | 0.3.0.8-r0 | — |
| Alpine v3.16 | tor | 0.3.0.8-r0 | — |
| Alpine v3.15 | tor | 0.3.0.8-r0 | — |
| Alpine v3.14 | tor | 0.3.0.8-r0 | — |
| Alpine v3.13 | tor | 0.3.0.8-r0 | — |
| Alpine v3.12 | tor | 0.3.0.8-r0 | — |
| Alpine v3.11 | tor | 0.3.0.8-r0 | — |
| Alpine v3.10 | tor | 0.3.0.8-r0 | — |
| Alpine v3.9 | tor | 0.3.0.8-r0 | — |
| Alpine v3.8 | tor | 0.3.0.8-r0 | — |
| Alpine v3.7 | tor | 0.3.0.8-r0 | — |
Advisories 3
- DSA-3877-1 tor - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-982-1 tor - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11469-1 tor-0.4.6.7-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026