Vulnerability · Published May 24, 2021 · Assigned by mitre
CVE-2021-33516
High 8.1
In plain English
A high-severity security flaw in the gupnp package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.1High
Exploit odds (30 days)1.1%top 34.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before 1.2.5. It allows DNS rebinding. A remote web server can exploit this vulnerability to trick a victim's browser into triggering actions against local UPnP services implemented using this library. Depending on the affected service, this could be used for data exfiltration, data tempering, etc.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | gupnp | 1.0.6-2.el8_4 | ALSA-2021:2363 |
| AlmaLinux:8 | gupnp-devel | 1.0.6-2.el8_4 | ALSA-2021:2363 |
| Debian:12 | gupnp | 1.4.0-2 | DEBIAN-CVE-2021-33516 |
| Debian:13 | gupnp | 1.4.0-2 | DEBIAN-CVE-2021-33516 |
| Debian:14 | gupnp | 1.4.0-2 | DEBIAN-CVE-2021-33516 |
| Rocky Linux:8 | gupnp | 0:1.0.6-2.el8_4 | RLSA-2021:2363 |