Description
The (1) Htpasswd authentication source in the authcrypt module and (2) SimpleSAML_Session class in SimpleSAMLphp 1.14.11 and earlier allow remote attackers to conduct timing side-channel attacks by leveraging use of the standard comparison operator to compare secret material against user input.
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 | simplesamlphp | 1.14.15-1 | — |
| Debian 12 | simplesamlphp | 1.14.15-1 | — |
| Debian 8 | simplesamlphp | 1.13.1-2+deb8u2 | DLA-1408-1 |
| Debian 7 | simplesamlphp | 1.9.2-1+deb7u1 | DLA-1205-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | simplesamlphp | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | simplesamlphp/simplesamlphp | < 1.15.0-rc1 | 1.15.0-rc1 | GHSA-v882-949x-6v28 |
Advisories 2
- DLA-1408-1 simplesamlphp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1205-1 simplesamlphp - security update Debian Security (DSA / DLA) · Mar 9, 2026