Description
SOGo before 5.12.13 contains a missing rate limiting vulnerability in its web login TOTP verification that allows attackers who already possess a victim's password to brute-force the second-factor code without triggering any lockout. Attackers can send repeated POST requests to /SOGo/connect with wrong verification codes at high speed since failed TOTP attempts never increment the failed-login counter and SOGoMaximumFailedLoginCount does not apply, enabling indefinite guessing across 30-second code windows to bypass two-factor authentication.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Alinto | sogo | < 5.12.13 | 5.12.13 |
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 13 | sogo | No fix yet | — |
| Debian 12 | sogo | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | sogo | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | sogo | No fix yet | — |
| Ubuntu Pro 22.04 LTS | sogo | No fix yet | — |
| Ubuntu Pro 20.04 LTS | sogo | No fix yet | — |
| Ubuntu Pro 18.04 LTS | sogo | No fix yet | — |
| Ubuntu Pro 16.04 LTS | sogo | No fix yet | — |
References
- Vendor Patch patch release-notes
- VulnCheck Advisory: SOGo before 5.12.13 Missing Rate Limiting on TOTP Verification third-party-advisory