CVE-2017-1000099

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-05 · updated 2026-06-17
Weakness: CWE-200

Description

When asking to get a file from a file:// URL, libcurl provides a feature that outputs meta-data about the file using HTTP-like headers. The code doing this would send the wrong buffer to the user (stdout or the application's provide callback), which could lead to other private data from the heap to get inadvertently displayed. The wrong buffer was an uninitialized memory area allocated on the heap and if it turned out to not contain any zero byte, it would continue and display the data following that buffer in memory.

Affected products

curl: 7.54.1

References

http://www.securityfocus.com/bid/100281
http://www.securitytracker.com/id/1039119
https://curl.haxx.se/0809C.patch
https://security.gentoo.org/glsa/201709-14
https://curl.haxx.se/docs/adv_20170809C.html
http://www.securityfocus.com/bid/100281
http://www.securitytracker.com/id/1039119
https://curl.haxx.se/0809C.patch
https://security.gentoo.org/glsa/201709-14

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