#VU64573 OS Command Injection in CPython - CVE-2015-20107

Vulnerability identifier: #VU64573

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-20107

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CPython
Universal components / Libraries / Scripting languages

Vendor: Python.org

Description

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

The vulnerability exists due to improper input validation in the mailcap module, which does not escape characters into commands discovered in the system mailcap file. A remote unauthenticated attacker can pass specially crafted data to the applications that call mailcap.findmatch with untrusted input and execute arbitrary OS commands on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

CPython: 3.10.0 - 3.10.4

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External links
https://github.com/python/cpython/issues/68966
https://bugs.python.org/issue24778
https://security.netapp.com/advisory/ntap-20220616-0001/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XO2H6CKWLRGTTZCGUQVELW6LUH437Q3O/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FIRUTX47BJD2HYJDLMI7JJBVCYFAPKAQ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ONXSGLASNLGFL57YU6WT6Y5YURSFV43U/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ERYMM2QVDPOJLX4LYXWYIQN5FOIJLDRY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MYG3EMFR7ZHC46TDNM7SNWO64A3W7EUF/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y4E2WBEJ42CGLGDHD6ZXOLZ2W6G3YOVD/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/46KWPTI72SSEOF53DOYQBQOCN4QQB2GE/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FCIO2W4DUVVMI6L52QCC4TT2B3K5VWHS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W5664BGZVTA46LQDNTYX5THG6CN4FYJX/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UIOJUZ5JMEMGSKNISTOVI4PDP36FDL5Y/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KAY6VBNVEFUXKJF37WFHYXUSRDEK34N3/

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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.