Fedora EPEL 6 update for python34

Published: 2019-04-08 | Updated: 2025-04-24

Risk	Medium
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2018-14647 CVE-2018-20406 CVE-2018-1060 CVE-2019-5010
CWE-ID	CWE-611 CWE-190 CWE-20 CWE-476
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #4 is available.
Vulnerable software	Fedora Operating systems & Components / Operating system python34 Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) XXE attack

EUVDB-ID: #VU15760

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-14647

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct XXE-attack.

The vulnerability exists due to improper handling of XML External Entities (XXEs) when parsing an XML file. A remote attacker can trick the victim into open an XML file that submits malicious input, trigger pathological hash collisions in Expat's internal data structures, consume large amounts CPU and RAM, and cause a denial of service (DoS) condition.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 6.0

python34: before 3.4.10-1.el6

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-73e99f4a82

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) Integer overflow

EUVDB-ID: #VU18403

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-20406

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in modules/_pickle.c when processing a large LONG_BINPUT value during the "resize to twice the size" attempt. A remote attacker can supply overly large data, trigger integer overflow and exhaust all resources on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 6.0

python34: before 3.4.10-1.el6

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-73e99f4a82

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: #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: 6.0

python34: before 3.4.10-1.el6

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-73e99f4a82

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) NULL pointer dereference

EUVDB-ID: #VU17805

Risk: Medium

CVSSv4.0: 7.7 [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:P/U:Green]

CVE-ID: CVE-2019-5010

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: Yes

Description

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

The vulnerability exists due to the X509 certificate parser of the affected software improperly handles X509 certificates with a certificate extension that uses a Certificate Revocation List (CRL) distribution point with empty distributionPoint and cRLIssuer fields. A remote attacker can send a request to initiate a Transport Layer Security (TLS) connection using an X509 certificate that submits malicious input, trigger a NULL pointer dereference condition that causes the application to crash, resulting in a DoS condition.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 6.0

python34: before 3.4.10-1.el6

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-73e99f4a82

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.