Severity High
Patch available YES
Number of vulnerabilities 4
CVE ID CVE-2019-15845
CVE-2019-16201
CVE-2019-16254
CVE-2019-16255
CWE ID CWE-20
CWE-113
CWE-94
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
Gentoo Linux

Operating systems & Components /
Operating system
Vendor Gentoo

Security Advisory

1) Input validation error

Severity: Medium

CVSSv3:
5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2019-15845

CWE-ID:
CWE-20 – Improper Input Validation

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists in Ruby due to insufficient validation of user-supplied files within File.fnmatch and File.fnmatch? functions when processing NUL byte in the filename. A remote attacker can bypass implemented security restrictions and gain unauthorized access to the system.

Mitigation

Update the affected packages.
dev-lang/ruby to version:

Vulnerable software versions

Gentoo Linux:

CPE
External links

https://security.gentoo.org/https://security.gentoo.org/glsa/202003-06

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) Input validation error

Severity: Medium

CVSSv3:
4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2019-16201

CWE-ID:
CWE-20 – Improper Input Validation

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the WEBrick::HTTPAuth::DigestAuth in Ruby due to a regular expression issue. A remote attacker can send a specially crafted request to the application and perform a denial of service attack.

Mitigation

Update the affected packages.
dev-lang/ruby to version:

Vulnerable software versions

Gentoo Linux:

CPE
External links

https://security.gentoo.org/https://security.gentoo.org/glsa/202003-06

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.

4) Code injection

Severity: High

CVSSv3:
7.1 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2019-16255

CWE-ID:
CWE-94 – Improper Control of Generation of Code (‘Code Injection’)

Description


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


The vulnerability exists due to improper input validation in lib/shell.rb in Ruby when processing Shell#[] and its alias Shell#test. A remote attacker can send a specially crafted request and execute arbitrary Ruby code on the target system.


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

Mitigation

Update the affected packages.
dev-lang/ruby to version:

Vulnerable software versions

Gentoo Linux:

CPE
External links

https://security.gentoo.org/https://security.gentoo.org/glsa/202003-06

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.





Source link

You must be logged in to post a comment.