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CURL-CVE-2016-8622

Published Nov 2, 2016·Last modified May 19, 2026
Affected Components(0)

No affected components available

Description

The URL percent-encoding decode function in libcurl is called curl_easy_unescape. Internally, even if this function would be made to allocate a destination buffer larger than 2GB, it would return that new length in a signed 32-bit integer variable, thus the length would get either truncated only or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.

This can be triggered by a user on a 64-bit system if the user can send in a custom (large) URL to a libcurl using program.

Risk Scores
Base Score
0.0

Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.

Threat Intelligence
0.0

No exploitation activity has been observed at this time. Continue routine monitoring.

EPSS
4.67%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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