Debian update for ruby2.3



Risk High
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2017-0898
CVE-2017-0903
CVE-2017-10784
CVE-2017-14033
CWE-ID CWE-20
CWE-502
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Debian Linux
Operating systems & Components / Operating system

Vendor Debian

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU8447

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-0898

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or obtain potentially sensitive information on the target system.

The weakness exists due to buffer underrun in the Kernel.sprintf() method. A remote attacker can provide a specially crafted format string value to cause the target interpreter to crash or potentially access data from the heap.

Successful exploitation of the vulnerability results in information disclosure or denial of service.

Mitigation

Update the affected package to version: 2.3.3-1+deb9u2

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/


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) Deserialization of untrusted data

EUVDB-ID: #VU8815

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-0903

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

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

The weakness exists due to YAML deserialization of gem specifications. A remote attacker can inject an instance of specially crafted serialized objects, gain elevated privileges and execute arbitrary Ruby code on RubyGems.org.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected package to version: 2.3.3-1+deb9u2

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html


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) Information disclosure

EUVDB-ID: #VU8448

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-10784

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or obtain potentially sensitive information on the target system.

The weakness exists due to escape sequence injection vulnerability in the Basic authentication of WEBrick. A remote attacker can supply a specially crafted user name value to the WEBrick Basic authentication function, inject escape sequence into the log file and view log contents.

Successful exploitation of the vulnerability results in information disclosure or denial of service.

Mitigation

Update the affected package to version: 2.3.3-1+deb9u2

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.ruby-lang.org/en/news/2017/09/14/webrick-basic-auth-escape-sequence-injection-cve-2017-1...


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) Improper input validation

EUVDB-ID: #VU8449

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-14033

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 weakness exists due to buffer underrun. A remote attacker can provide a specially crafted string to the OpenSSL::ASN1 decode function to cause the target interpreter to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected package to version: 2.3.3-1+deb9u2

Vulnerable software versions

Debian Linux: All versions

CPE2.3 External links

https://www.ruby-lang.org/en/news/2017/09/14/openssl-asn1-buffer-underrun-cve-2017-14033/


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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