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CVE-2017-8821

UnknownEPSS 1.96%

Last modified

CVE-2017-8821 is a vulnerability of currently unknown severity. In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the OpenSSL library to ask the user for the password, aka TROVE-2017-011.. EPSS estimates a 1.96% chance of exploitation in the next 30 days.

Description

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the OpenSSL library to ask the user for the password, aka TROVE-2017-011.

Metrics

EPSS Probability
1.96%

77.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Tor ProjectTor< 0.2.5.16
Tor ProjectTor>= 0.2.6, < 0.2.8.17
Tor ProjectTor>= 0.2.9, < 0.2.9.14
Tor ProjectTor>= 0.3.0, < 0.3.0.13
Tor ProjectTor>= 0.3.1, < 0.3.1.9
DebianDebian Linux8.0
DebianDebian Linux9.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-8821?
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the OpenSSL library to ask the user for the password, aka TROVE-2017-011.
How severe is CVE-2017-8821?
Severity scoring for CVE-2017-8821 is pending analysis. The EPSS model estimates a 1.96% probability of exploitation in the next 30 days.
How do I fix CVE-2017-8821?
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.

Are you affected by CVE-2017-8821?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST