Description
curl supports "globbing" of URLs, in which a user can pass a numerical range to have the tool iterate over those numbers to do a sequence of transfers. In the globbing function that parses the numerical range, there was an omission that made curl read a byte beyond the end of the URL if given a carefully crafted, or just wrongly written, URL. The URL is stored in a heap based buffer, so it could then be made to wrongly read something else instead of crashing. An example of a URL that triggers the flaw would be `http://ur%20[0-60000000000000000000`.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | curl | 7.55.0-1 | — |
| Debian 13 | curl | 7.55.0-1 | — |
| Debian 12 | curl | 7.55.0-1 | — |
| Debian 9 | curl | 7.52.1-5+deb9u1 | DSA-3992-1 |
| Debian 8 | curl | 7.38.0-4+deb8u6 | DSA-3992-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | curl | 7.47.0-1ubuntu2.3 | USN-3441-1 |
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.11 | USN-3441-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | httpd24-curl +2 | 7.61.1-1.el6 | RHSA-2018:3558 |
| RHEL 3 | httpd24-httpd +5 | 2.4.34-7.el6 | RHSA-2018:3558 |
| RHEL 3 | httpd24-mod_md | 2.4.34-7.el7 | RHSA-2018:3558 |
| RHEL 3 | httpd24-mod_ssl +1 | 1:2.4.34-7.el6 | RHSA-2018:3558 |
| RHEL 3 | httpd24-nghttp2 +2 | 1.7.1-7.el6 | RHSA-2018:3558 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | curl | 7.37.0-37.3.1 | SUSE-SU-2017:2174-1 |
| SLES 12 SP2 | curl | 7.37.0-37.3.1 | SUSE-SU-2017:2174-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | curl | 7.37.0-37.3.1 | SUSE-SU-2017:2174-1 |
| SLES for SAP 12 SP2 | curl | 7.37.0-37.3.1 | SUSE-SU-2017:2174-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.79.1-1.1 | openSUSE-SU-2024:10582-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.55.0-r0 | — |
| Alpine v3.23 | curl | 7.55.0-r0 | — |
| Alpine v3.22 | curl | 7.55.0-r0 | — |
| Alpine v3.21 | curl | 7.55.0-r0 | — |
| Alpine v3.20 | curl | 7.55.0-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.55.0-r0 | — |
| Alpine v3.18 | curl | 7.55.0-r0 | — |
| Alpine v3.17 | curl | 7.55.0-r0 | — |
| Alpine v3.16 | curl | 7.55.0-r0 | — |
| Alpine v3.15 | curl | 7.55.0-r0 | — |
| Alpine v3.14 | curl | 7.55.0-r0 | — |
| Alpine v3.13 | curl | 7.55.0-r0 | — |
| Alpine v3.12 | curl | 7.55.0-r0 | — |
| Alpine v3.11 | curl | 7.55.0-r0 | — |
| Alpine v3.10 | curl | 7.55.0-r0 | — |
| Alpine v3.9 | curl | 7.55.0-r0 | — |
| Alpine v3.8 | curl | 7.55.0-r0 | — |
| Alpine v3.7 | curl | 7.55.0-r0 | — |
| Alpine v3.6 | curl | 7.55.0-r0 | — |
| Alpine v3.5 | curl | 7.55.0-r0 | — |
| Alpine v3.4 | curl | 7.55.0-r0 | — |
| Alpine v3.3 | curl | 7.55.0-r0 | — |
Advisories 10
- RHSA-2018:3558 Red Hat Security Advisory: httpd24 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-3441-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-3992-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10582-1 curl-7.79.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2174-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- VDE-2019-009 PHOENIX CONTACT: Multiple Vulnerabilities in AXC F 2152 CERT@VDE · May 22, 2025
- WID-SEC-2025-0370 Apple Mac OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 13, 2025
- WID-SEC-2023-1647 cURL: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen BSI CERT-Bund (WID) · Jul 4, 2023
- ICSA-19-155-01 PHOENIX CONTACT PLCNext AXC F 2152 CISA ICS & IT advisories · Jun 4, 2019
References
- https://support.apple.com/HT208221
- RHSA-2018:3558 vendor-advisory
- GLSA-201709-14 vendor-advisory
- https://curl.haxx.se/docs/adv_20170809A.html
- 1039117 vdb-entry
- 100249 vdb-entry
- DSA-3992 vendor-advisory