Fedora 30 update for python36

Published: 2019-07-03 | Updated: 2025-04-25

Risk	Medium
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2019-9636 CVE-2019-9740 CVE-2019-10160 CVE-2018-1060
CWE-ID	CWE-20 CWE-93
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software	Fedora Operating systems & Components / Operating system python36 Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU18355

Risk: Medium

CVSSv4.0: 4.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-9636

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input when processing data in Unicode encoding with an incorrect netloc during NFKC normalization. A remote attacker can gain access to sensitive information.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

python36: before 3.6.9-1.fc30

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-7723d4774a

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) CRLF injection

EUVDB-ID: #VU18829

Risk: Medium

CVSSv4.0: 2.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2019-9740

CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform CRLF injection attacks.

The vulnerability exists within urllib2 implementation for Python 2.x and urllib3 implementation for Python 3.x when processing the path component of a URL after the "?" character within the urllib.request.urlopen() call. A remote attacker with ability to control URL, passed to the application, can use CRLF sequences to split the HTTP request and inject arbitrary HTTP headers into request, made by the application.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

python36: before 3.6.9-1.fc30

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-7723d4774a

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. However, proof of concept for this vulnerability is available.

3) Input validation error

EUVDB-ID: #VU20071

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10160

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user and password parts of a URL. This issue exists due to incorrect patch for previous issue described in SB2019030811 (CVE-2019-9636). A remote attacker can gain access to sensitive information.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

python36: before 3.6.9-1.fc30

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-7723d4774a

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

4) Improper input validation

EUVDB-ID: #VU12283

Risk: Medium

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:Green]

CVE-ID: CVE-2018-1060

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The weakness exists due to the way catastrophic backtracking was implemented in apop() method in pop3lib. A remote attacker can cause the service to crash.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

python36: before 3.6.9-1.fc30

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-7723d4774a

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.