CVE-2017-7407

Publication date 3 April 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The ourWriteOut function in tool_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from process memory in opportunistic circumstances by reading a workstation screen during use of a --write-out argument ending in a '%' character, which leads to a heap-based buffer over-read.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	17.10 artful	Not affected
	17.04 zesty	Fixed 7.52.1-4ubuntu1.2
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 7.47.0-1ubuntu2.3
	14.04 LTS trusty	Fixed 7.35.0-1ubuntu2.11
	12.04 LTS precise	Ignored end of life

Notes

tyhicks

Affected code is in src/writeout.c in older releases

mdeslaur

first commit is in 7.52.1-4, second one isn't

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
curl	Upstream: 1890d59 Upstream: 8e65877

Severity score breakdown

Parameter	Value
Base score	2.4 · Low
Attack vector	Physical
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N