Description
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
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 | erlang | 1:21.2.6+dfsg-1 | — |
| Debian 13 | erlang | 1:21.2.6+dfsg-1 | — |
| Debian 12 | erlang | 1:21.2.6+dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | yaws | No fix yet | — |
| Ubuntu 26.04 LTS | yaws | No fix yet | — |
| Ubuntu 25.10 | yaws | No fix yet | — |
| Ubuntu 24.04 LTS | yaws | No fix yet | — |
| Ubuntu 22.04 LTS | yaws | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | yaws | No fix yet | — |
| Ubuntu Pro 20.04 LTS | yaws | No fix yet | — |
| Ubuntu Pro 16.04 LTS | yaws | No fix yet | — |