Description
usttrace in LTTng Userspace Tracer (aka UST) 0.7 places a zero-length directory name in the LD_LIBRARY_PATH, which allows local users to gain privileges via a Trojan horse shared library in the current working directory.
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 | ust | 0.7-2.1 | — |
| Debian 13 | ust | 0.7-2.1 | — |
| Debian 12 | ust | 0.7-2.1 | — |