Description
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, it is possible to read any arbitrary file even when the `live_dangerously` is not enabled. This allows arbitrary files to be read. Asterisk versions 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, contain a fix for this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| asterisk | asterisk | < 18.20.1, >= 19.0.0, < 20.5.1, = 21.0.0, < 18.9-cert6 | — |
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 | asterisk | 1:20.5.1~dfsg+~cs6.13.40431414-1 | — |
| Debian 11 | asterisk | 1:16.28.0~dfsg-0+deb11u4 | DSA-5596-1 |
| Debian 10 | asterisk | 1:16.28.0~dfsg-0+deb10u4 | DLA-3696-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | asterisk | No fix yet | — |
| Ubuntu 26.04 LTS | asterisk | No fix yet | — |
| Ubuntu 25.10 | asterisk | No fix yet | — |
| Ubuntu 24.04 LTS | asterisk | No fix yet | — |
| Ubuntu 22.04 LTS | asterisk | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | asterisk | No fix yet | — |
| Ubuntu 18.04 LTS | asterisk | No fix yet | — |
| Ubuntu Pro 16.04 LTS | asterisk | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | asterisk | 20.5.1-r0 | — |
| Alpine v3.23 | asterisk | 20.5.1-r0 | — |
| Alpine v3.22 | asterisk | 20.5.1-r0 | — |
| Alpine v3.21 | asterisk | 20.5.1-r0 | — |
| Alpine v3.20 | asterisk | 20.5.1-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | asterisk | 20.5.1-r0 | — |
| Alpine v3.18 | asterisk | 18.20.2-r0 | — |
| Alpine v3.17 | asterisk | 18.20.2-r0 | — |
| Alpine v3.16 | asterisk | 18.20.2-r0 | — |
Advisories 3
- WID-SEC-2023-3158 Digium Certified Asterisk: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 12, 2026
- DSA-5596-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3696-1 asterisk - security update Debian Security (DSA / DLA) · Mar 9, 2026