CVE-2020-6174 Incorrect threshold signature computation in TUF

Critical 9.8 Published Updated

Attackers can bypass cryptographic signature verification in the TUF library, potentially allowing the installation of malicious software updates.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2020-6174?

CVE-2020-6174 is a critical vulnerability in n/a, published on 5 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TUF (aka The Update Framework) through 0.12.1 has Improper Verification of a Cryptographic Signature.

Weakness: CWE-347

Which versions are affected by CVE-2020-6174?

3 open source packages ship an affected version, including tuf. It affects 1 product.

PackageAffectedFixed in
tuf PyPIAll versions0.12.2
tuf PyPIAll versions0.12.2
tuf PyPIAll versions0.12.2

Products include Linuxfoundation the Update Framework.

How do I fix CVE-2020-6174?

Upgrade tuf to 0.12.2 or later.

Is CVE-2020-6174 being exploited?

There is no known exploitation of CVE-2020-6174 in the wild and no public exploit code.

Sources

Also known as GHSA-pwqf-9h7j-7mv8, PYSEC-2020-147.

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