CVE-2015-20107

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

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python2.7	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Fixed 2.7.18-13ubuntu2
	22.04 LTS jammy	Fixed 2.7.18-13ubuntu1.1
	21.10 impish	Fixed 2.7.18-8ubuntu0.2
	20.04 LTS focal	Fixed 2.7.18-1~20.04.3
	18.04 LTS bionic	Fixed 2.7.17-1~18.04ubuntu1.8
	16.04 LTS xenial	Fixed 2.7.12-1ubuntu0~16.04.18+esm2 Ubuntu Pro
	14.04 LTS trusty	Fixed 2.7.6-8ubuntu0.6+esm11 Ubuntu Pro
python3.10	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not affected
	22.04 LTS jammy	Fixed 3.10.4-3ubuntu0.1
	21.10 impish	Ignored
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.4	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Fixed 3.4.3-1ubuntu1~14.04.7+esm13 Ubuntu Pro
python3.5	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Fixed 3.5.2-2ubuntu0~16.04.13+esm3 Ubuntu Pro
	14.04 LTS trusty	Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1 Ubuntu Pro
python3.6	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Fixed 3.6.9-1~18.04ubuntu1.8
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.7	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Fixed 3.7.5-2ubuntu1~18.04.2+esm3 Ubuntu Pro
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.8	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	20.04 LTS focal	Fixed 3.8.10-0ubuntu1~20.04.5
	18.04 LTS bionic	Fixed 3.8.0-3ubuntu1~18.04.2+esm2 Ubuntu Pro
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.9	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Fixed 3.9.7-2ubuntu0.1
	20.04 LTS focal	Fixed 3.9.5-3ubuntu0~20.04.1+esm1 Ubuntu Pro
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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Notes

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.

Severity score breakdown

Parameter	Value
Base score	7.6 · High
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	High
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

References

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