CVE-2017-1000099: haxx libcurl
Vulnerability summary
CVE-2017-1000099 is a medium (CVSS 6.5) vulnerability in haxx libcurl. EPSS estimates a 2.65% chance of exploitation in the next 30 days, higher than 85.6% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 04-10-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS trend
Probability
2.65%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.65% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- curl< 7.55.0-r0
Haxx1 product
- libcurl7.54.1
2 vendors · 2 products
References
6 links- security.gentoo.org/glsa/201709-14Vendor AdvisoryX Refsource GENTOOPatchThird Party AdvisoryVDB Entry
- curl.haxx.se/docs/adv_20170809C.htmlVendor Advisory