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Gentoo update for Python



Published: 2020-08-02
Severity Medium
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-20907
CVE-2020-14422
CWE ID CWE-835
CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Advisory

1) Infinite loop

Severity: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-20907

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The vulnerability exists due to infinite loop In Lib/tarfile.py in Python. A remote attacker can create a specially crafted TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

Mitigation

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

Vulnerable software versions

Gentoo Linux: -

CPE External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/202008-01

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) Resource exhaustion

Severity: Medium

CVSSv3: 5.9 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-14422

CWE-ID: CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')

Exploit availability: No

Description

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

The vulnerability exists due to application improperly computes hash values in the IPv4Interface and IPv6Interface classes within the Lib/ipaddress.py in Python. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created.

Mitigation

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

Vulnerable software versions

Gentoo Linux: -

CPE External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/202008-01

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.