Description
The ourWriteOut function in tool_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from process memory in opportunistic circumstances by reading a workstation screen during use of a --write-out argument ending in a '%' character, which leads to a heap-based buffer over-read.
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 | 7.52.1-4 | — |
| Debian 13 | curl | 7.52.1-4 | — |
| Debian 12 | curl | 7.52.1-4 | — |
| Debian 7 | curl | 7.26.0-1+wheezy19 | DLA-883-1 |
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 SP2 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES 12 SP1 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES 11 SP4 | curl | 7.19.7-1.69.1 | SUSE-SU-2017:2312-1, SUSE-SU-2017:1043-1 |
| SLES 11 | curl-openssl1 | 7.19.7-1.69.1 | SUSE-SU-2017:2312-1, SUSE-SU-2017:1043-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Studio Onsite 1.3 | curl | 7.19.7-1.20.52.2 | SUSE-SU-2017:1117-1 |
| SLES for SAP 12 SP2 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES for SAP 12 SP1 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES for SAP 11 SP4 | curl | 7.19.7-1.69.1 | SUSE-SU-2017:2312-1, SUSE-SU-2017:1043-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.53.1-r2 | — |
| Alpine v3.23 | curl | 7.53.1-r2 | — |
| Alpine v3.22 | curl | 7.53.1-r2 | — |
| Alpine v3.21 | curl | 7.53.1-r2 | — |
| Alpine v3.20 | curl | 7.53.1-r2 | — |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.53.1-r2 | — |
| Alpine v3.18 | curl | 7.53.1-r2 | — |
| Alpine v3.17 | curl | 7.53.1-r2 | — |
| Alpine v3.16 | curl | 7.53.1-r2 | — |
| Alpine v3.15 | curl | 7.53.1-r2 | — |
| Alpine v3.14 | curl | 7.53.1-r2 | — |
| Alpine v3.13 | curl | 7.53.1-r2 | — |
| Alpine v3.12 | curl | 7.53.1-r2 | — |
| Alpine v3.11 | curl | 7.53.1-r2 | — |
| Alpine v3.10 | curl | 7.53.1-r2 | — |
| Alpine v3.9 | curl | 7.53.1-r2 | — |
| Alpine v3.8 | curl | 7.53.1-r2 | — |
| Alpine v3.7 | curl | 7.53.1-r2 | — |
| Alpine v3.6 | curl | 7.53.1-r2 | — |
| Alpine v3.5 | curl | 7.52.1-r3 | — |
| Alpine v3.4 | curl | 7.52.1-r2 | — |
| Alpine v3.3 | curl | 7.52.1-r1 | — |
| Alpine v3.2 | curl | 7.52.1-r1 | — |
Advisories 7
- 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
- DLA-883-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:1117-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1043-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2312-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1042-1 Security update for curl SUSE / openSUSE Security Updates · May 2, 2025