openEuler 20.03 LTS update for python2; python3

1) Infinite loop

EUVDB-ID: #VU32881

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-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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

python3-help: before 3.7.4-11

python3-devel: before 3.7.4-11

python3-debugsource: before 3.7.4-11

python3-debuginfo: before 3.7.4-11

python3-debug: before 3.7.4-11

python3: before 3.7.4-11

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS:*:*:*:*:*:*
• cpe:2.3:a:openeuler:python3-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:python3-devel:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:python3-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:python3-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:python3-debug:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:python3:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1058

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.