VulnerabilityModified

CVE-2017-9502

MEDIUM 5.3EPSS 3.29%

Does this matter?

Lower severity and a low EPSS score (3.29%). Track it; it rarely justifies an emergency change on its own.

Description

In curl before 7.54.1 on Windows and DOS, libcurl's default protocol function, which is the logic that allows an application to set which protocol libcurl should attempt to use when given a URL without a scheme part, had a flaw that could lead to it overwriting a heap based memory buffer with seven bytes. If the default protocol is specified to be FILE or a file: URL lacks two slashes, the given "URL" starts with a drive letter, and libcurl is built for Windows or DOS, then libcurl would copy the path 7 bytes off, so that the end of the given path would write beyond the malloc buffer (7 bytes being the length in bytes of the ascii string "file://").

CVSS 3.0: 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS: 3.29% probability · 88th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-119
Affected: haxx/curl
Source: cve@mitre.org

EPSS trend

EPSS 3.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

http://openwall.com/lists/oss-security/2017/06/14/1Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/99120Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038697
https://curl.haxx.se/docs/adv_20170614.htmlVendor Advisory
http://openwall.com/lists/oss-security/2017/06/14/1Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/99120Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038697
https://curl.haxx.se/docs/adv_20170614.htmlVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.