Description
LibTomCrypt through 1.18.1 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
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 | libtomcrypt | 1.18.2-1 | — |
| Debian 13 | libtomcrypt | 1.18.2-1 | — |
| Debian 12 | libtomcrypt | 1.18.2-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libtomcrypt | 1.18.1-1ubuntu0.1 | — |
| Ubuntu 16.04 LTS | libtomcrypt | 1.17-7ubuntu0.1 | — |
| Ubuntu 14.04 LTS | libtomcrypt | 1.17-5ubuntu0.1 | — |