PT-2019-4131 · Go+4 · Go+4
Daniel Mandragona
·
Published
2019-10-24
·
Updated
2024-06-15
·
CVE-2019-17596
CVSS v2.0
7.8
High
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Go versions prior to 1.12.11
Go versions 1.3.x prior to 1.13.2
Description
The issue is related to an error in the DSA public key verification function, which can cause a panic when processing network traffic containing an invalid DSA public key. This can be exploited by an attacker to cause a denial of service. There are several attack scenarios, including traffic from a client to a server that verifies client certificates. The vulnerability can also be triggered by using crypto/x509.Verify on a crafted X.509 certificate chain, or by invoking crypto/x509.(*CertificateRequest).CheckSignature on an X.509 certificate request.
Recommendations
For Go versions prior to 1.12.11, update to version 1.12.11 or later to resolve the issue.
For Go versions 1.3.x prior to 1.13.2, update to version 1.13.2 or later to resolve the issue.
As a temporary workaround, consider disabling the
dsa.Verify() function until a patch is available.
Restrict access to the vulnerable crypto/x509 module to minimize the risk of exploitation.
Avoid using the crypto/x509.Verify function on untrusted X.509 certificate chains until the issue is resolved.Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Go
Red Hat
Suse