Multiple vulnerabilities in Go



Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2018-16874
CVE-2018-16873
CVE-2018-16875
CWE-ID CWE-22
CWE-77
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Go programming language
Universal components / Libraries / Scripting languages

Vendor Google

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Path traversal

EUVDB-ID: #VU16544

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-16874

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct a directory traversal attack on the target system.

The vulnerability exists in the go get command due to path traversal attack when the affected software executes the go get command with the import path of a Go package that contains curly braces. A remote unauthenticated attacker can execute the go get command, trick the victim into accessing a Go package that submits malicious input, conduct a directory traversal attack, which the attacker can use to execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

The vulnerability has been fixed in the version 1.10.6, 1.11.3.

Vulnerable software versions

Go programming language: 1.0 - 1.11.2

CPE2.3 External links

https://github.com/golang/go/issues/29231


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.

2) Command injection

EUVDB-ID: #VU16545

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-16873

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists in the go get command due to import path of a malicious Go package, or a package that imports it directly or indirectly. A remote unauthenticated attacker can use a vanity import path that ends with "/.git", use custom domains to arrange things so that a Git repository is cloned to a folder named ".git", trick the victim into considering the parent directory as a repository root, and run Git commands on it that will use the "config" file in the original Git repository root for its configuration, and if that config file contains malicious commands, and execute arbitrary code on the system running "go get -u".

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

The vulnerability has been fixed in the version 1.10.6, 1.11.3.

Vulnerable software versions

Go programming language: 1.0 - 1.11.2

CPE2.3 External links

https://github.com/golang/go/issues/29230


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.

3) Improper input validation

EUVDB-ID: #VU16546

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16875

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists on Go TLS servers accepting client certificates and TLS clients due to the crypto/x509 package does not limit the amount of work performed for each chain verification. A remote unauthenticated attacker can craft pathological inputs leading to a CPU denial of service.

Mitigation

The vulnerability has been fixed in the version 1.10.6, 1.11.3.

Vulnerable software versions

Go programming language: 1.0 - 1.11.2

CPE2.3 External links

https://github.com/golang/go/issues/29233


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.



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