Vulnerability · Published Mar 19, 2021 · Assigned by mitre
CVE-2021-28089
High 7.5
In plain English
A high-severity security flaw in the tor package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.7%top 23.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | tor | 0.4.5.7-r0 | ALPINE-CVE-2021-28089 |
| Alpine:v3.21 | tor | 0.4.5.7-r0 | ALPINE-CVE-2021-28089 |
| Alpine:v3.22 | tor | 0.4.5.7-r0 | ALPINE-CVE-2021-28089 |
| Alpine:v3.23 | tor | 0.4.5.7-r0 | ALPINE-CVE-2021-28089 |
| Alpine:v3.24 | tor | 0.4.5.7-r0 | ALPINE-CVE-2021-28089 |
| Debian:12 | tor | 0.4.5.7-1 | DEBIAN-CVE-2021-28089 |
| Debian:13 | tor | 0.4.5.7-1 | DEBIAN-CVE-2021-28089 |
| Debian:14 | tor | 0.4.5.7-1 | DEBIAN-CVE-2021-28089 |
Affected products (as reported)
References
- https://gitlab.torproject.org/tpo/core/tor/-/issues/40304 x_refsource_MISC
- https://blog.torproject.org/node/2009 x_refsource_CONFIRM
- FEDORA-2021-e68317166d vendor-advisory, x_refsource_FEDORA
- GLSA-202107-25 vendor-advisory, x_refsource_GENTOO