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CVE-2021-33516

HIGHCVSS 8.1/10EPSS 1.08%

Last modified

CVE-2021-33516 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 1.08% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS Probability
1.08%

61.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
GnomeGupnp< 1.0.7
GnomeGupnp>= 1.1.0, < 1.2.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-33516?
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.
How severe is CVE-2021-33516?
CVE-2021-33516 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33516?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST