Description
An incorrect "pair?" check in the Scheme "length" procedure results in an unsafe pointer dereference in all CHICKEN Scheme versions prior to 4.13, which allows an attacker to cause a denial of service by passing an improper list to an application that calls "length" on it.
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 | chicken | 4.12.0-0.2 | — |
| Debian 13 | chicken | 4.12.0-0.2 | — |
| Debian 12 | chicken | 4.12.0-0.2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | chicken | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | chicken | 4.12.0-r2 | — |
| Alpine v3.23 | chicken | 4.12.0-r2 | — |
| Alpine v3.22 | chicken | 4.12.0-r2 | — |
| Alpine v3.21 | chicken | 4.12.0-r2 | — |
| Alpine v3.20 | chicken | 4.12.0-r2 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | chicken | 4.12.0-r2 | — |
| Alpine v3.18 | chicken | 4.12.0-r2 | — |
| Alpine v3.17 | chicken | 4.12.0-r2 | — |
| Alpine v3.16 | chicken | 4.12.0-r2 | — |
| Alpine v3.15 | chicken | 4.12.0-r2 | — |
| Alpine v3.14 | chicken | 4.12.0-r2 | — |
| Alpine v3.13 | chicken | 4.12.0-r2 | — |
| Alpine v3.12 | chicken | 4.12.0-r2 | — |
| Alpine v3.11 | chicken | 4.12.0-r2 | — |
| Alpine v3.10 | chicken | 4.12.0-r2 | — |
| Alpine v3.9 | chicken | 4.12.0-r2 | — |
| Alpine v3.8 | chicken | 4.12.0-r2 | — |
| Alpine v3.7 | chicken | 4.12.0-r2 | — |
| Alpine v3.6 | chicken | 4.12.0-r2 | — |