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Ubuntu.comUB:CVE-2015-20107

HistoryApr 13, 2022 - 12:00 a.m.

CVE-2015-20107

2022-04-1300:00:00

ubuntu.com

python

cpython

mailcap module

shell command injection

system mailcap file

security fix

back-porting

patch

discussions

unix

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

COMPLETE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:C/A:P

CVSS3

7.6

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

EPSS

0.002

Percentile

55.8%

JSON

In Python (aka CPython) up to 3.10.8, the mailcap module does not add
escape characters into commands discovered in the system mailcap file. This
may allow attackers to inject shell commands into applications that call
mailcap.findmatch with untrusted input (if they lack validation of
user-provided filenames or arguments). The fix is also back-ported to 3.7,
3.8, 3.9

Bugs

Notes

Author	Note
leosilva	patch was proposed in cpython Lib/mailcap.py but not merged yet. it sounds a better approach was PR to fix that issue, but still not merged yet. there are plenty of discussions going on about proper ways to fix that issue, but none was accept yet that fix the issue and keep the software working properly.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchpython2.7< 2.7.17-1~18.04ubuntu1.8UNKNOWN
ubuntu20.04noarchpython2.7< 2.7.18-1~20.04.3UNKNOWN
ubuntu21.10noarchpython2.7< 2.7.18-8ubuntu0.2UNKNOWN
ubuntu22.04noarchpython2.7< 2.7.18-13ubuntu1.1UNKNOWN
ubuntu22.10noarchpython2.7< 2.7.18-13ubuntu2UNKNOWN
ubuntu14.04noarchpython2.7< 2.7.6-8ubuntu0.6+esm11UNKNOWN
ubuntu16.04noarchpython2.7< 2.7.12-1ubuntu0~16.04.18+esm2UNKNOWN
ubuntu22.04noarchpython3.10< 3.10.4-3ubuntu0.1UNKNOWN
ubuntu14.04noarchpython3.4< 3.4.3-1ubuntu1~14.04.7+esm13UNKNOWN
ubuntu14.04noarchpython3.5< 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	python2.7	< 2.7.17-1~18.04ubuntu1.8	UNKNOWN
ubuntu	20.04	noarch	python2.7	< 2.7.18-1~20.04.3	UNKNOWN
ubuntu	21.10	noarch	python2.7	< 2.7.18-8ubuntu0.2	UNKNOWN
ubuntu	22.04	noarch	python2.7	< 2.7.18-13ubuntu1.1	UNKNOWN
ubuntu	22.10	noarch	python2.7	< 2.7.18-13ubuntu2	UNKNOWN
ubuntu	14.04	noarch	python2.7	< 2.7.6-8ubuntu0.6+esm11	UNKNOWN
ubuntu	16.04	noarch	python2.7	< 2.7.12-1ubuntu0~16.04.18+esm2	UNKNOWN
ubuntu	22.04	noarch	python3.10	< 3.10.4-3ubuntu0.1	UNKNOWN
ubuntu	14.04	noarch	python3.4	< 3.4.3-1ubuntu1~14.04.7+esm13	UNKNOWN
ubuntu	14.04	noarch	python3.5	< 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1	UNKNOWN