6.5

CVE-2017-1000100: haxx libcurl

Modified
AliasesALPINE-CVE-2017-1000100SUSE-SU-2017:2354-1UBUNTU-CVE-2017-1000100
Published 04-10-2017Last modified 16-04-2026

Vulnerability summary

CVE-2017-1000100 is a medium (CVSS 6.5) vulnerability in haxx libcurl. EPSS estimates a 3.96% chance of exploitation in the next 30 days, higher than 90.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
3.96%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 4
DSA-3992-1MGASA-2017-0281MGASA-2018-0053OPENSUSE-SU-2024:10582-1RHSA-2018:3558SUSE-SU-2017:2174-1

Timeline

  1. 04-10-2017
    PublishedVulnerability first disclosed.
  2. 16-04-2026
    Last modifiedVulnerability information updated.

Description

When doing a TFTP transfer and curl/libcurl is given a URL that contains a very long file name (longer than about 515 bytes), the file name is truncated to fit within the buffer boundaries, but the buffer size is still wrongly updated to use the untruncated length. This too large value is then used in the sendto() call, making curl attempt to send more data than what is actually put into the buffer. The endto() function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.

CVSS metrics

8 scores · 5 sources · 3 versions

EPSS trend

Probability

3.96%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

No change 0.00 pp

From 3.96% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • curl< 7.55.0-r0
Debian1 product
  • curl< 7.55.0-1 | < 7.26.0-1+wheezy20
Haxx1 product
  • libcurl7.15.0 | 7.15.1 | 7.15.2 | 7.15.3 | 7.15.4 | 7.15.5 | 7.16.0 | 7.16.1 | 7.16.2 | 7.16.3 | 7.16.4 | 7.17.0 | 7.17.1 | 7.18.0 | 7.18.1 | 7.18.2 | 7.19.0 | 7.19.1 | 7.19.2 | 7.19.3 | 7.19.4 | 7.19.5 | 7.19.6 | 7.19.7 | 7.20.0 | 7.20.1 | 7.21.0 | 7.21.1 | 7.21.2 | 7.21.3 | 7.21.4 | 7.21.5 | 7.21.6 | 7.21.7 | 7.22.0 | 7.23.0 | 7.23.1 | 7.24.0 | 7.25.0 | 7.26.0 | 7.27.0 | 7.28.0 | 7.28.1 | 7.29.0 | 7.30.0 | 7.31.0 | 7.32.0 | 7.33.0 | 7.34.0 | 7.35.0 | 7.36.0 | 7.37.0 | 7.37.1 | 7.38.0 | 7.39 | 7.40.0 | 7.41.0 | 7.42.0 | 7.42.1 | 7.43.0 | 7.44.0 | 7.45.0 | 7.46.0 | 7.47.0 | 7.47.1 | 7.48.0 | 7.49.0 | 7.49.1 | 7.50.0 | 7.50.1 | 7.50.2 | 7.50.3 | 7.51.0 | 7.52.0 | 7.52.1 | 7.53.0 | 7.53.1 | 7.54.0 | 7.54.1
Suse1 product
  • curl&distro=SUSE Studio Onsite 1.3< 7.19.7-1.20.53.3.1
Ubuntu1 product
  • curl< 7.35.0-1ubuntu2.11 | < 7.47.0-1ubuntu2.3

5 vendors · 5 products

References

16 links
Show all 16 references