Input validation error in go (Alpine package)

1) Input validation error

EUVDB-ID: #VU22020

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17596

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of DSA public keys in crypto/x509.Verify. A remote attacker can pass a specially crafted X.509 certificate chain to the application and perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

go (Alpine package): 1.12.6-r0 - 1.13.4-r2

External links

http://git.alpinelinux.org/aports/commit/?id=573b7537c7e1ab2732007a1d026a913613ca2d03
http://git.alpinelinux.org/aports/commit/?id=17caf1ca31bcf51f92d7f466d287824869ec3f25
http://git.alpinelinux.org/aports/commit/?id=c64d2552678a7126d5e1d18ac54ea0ee126298d9
http://git.alpinelinux.org/aports/commit/?id=c325c4cf49fc80b50d1eac10a708571fe54dd4a0
http://git.alpinelinux.org/aports/commit/?id=3b2d519d19eed612aeaf0a62ee9003e23cbe7c2f
http://git.alpinelinux.org/aports/commit/?id=d7b13c44a74649bc533f1d55da1a08319da4cfe4
http://git.alpinelinux.org/aports/commit/?id=971e4b11222464f77b1bb47c32f4f1c83cd89d86
http://git.alpinelinux.org/aports/commit/?id=3eda71ae2f9197704bc3b59f8ab7563f81cefb4d

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.