Description
Lasso 2.2.1 and earlier does not properly check the return value from the OpenSSL DSA_verify function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.
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 | lasso | 2.2.1-2 | — |
| Debian 13 | lasso | 2.2.1-2 | — |
| Debian 12 | lasso | 2.2.1-2 | — |
| Debian 4.0 | lasso | 0.6.5-3+etch1 | DSA-1700-1 |
Advisories 1
- DSA-1700-1 lasso - validation bypass Debian Security (DSA / DLA) · Mar 9, 2026