Description
The curl_easy_duphandle function in libcurl 7.17.1 through 7.38.0, when running with the CURLOPT_COPYPOSTFIELDS option, does not properly copy HTTP POST data for an easy handle, which triggers an out-of-bounds read that allows remote web servers to read sensitive memory information.
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 | 7.38.0-3 | — |
| Debian 13 | curl | 7.38.0-3 | — |
| Debian 12 | curl | 7.38.0-3 | — |
| Debian 7 | curl | 7.26.0-1+wheezy11 | DSA-3069-1 |
| Debian 6.0 | curl | 7.21.0-2.1+squeeze10 | DLA-84-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.2 | USN-2399-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | curl +2 | 7.29.0-25.el7 | RHSA-2015:2159 |
| RHEL 6 | curl +2 | 7.19.7-46.el6 | RHSA-2015:1254 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | curl +2 | 7.29.0-25.0.1.el7 | ELSA-2015-2159 |
Advisories 6
- RHSA-2015:2159 Red Hat Security Advisory: curl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2015:1254 Red Hat Security Advisory: curl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2399-1 curl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-84-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3069-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2015-2159 Moderate: curl security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 23, 2015
References
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- DSA-3069 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- USN-2399-1 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- APPLE-SA-2015-08-13-2 vendor-advisory
- RHSA-2015:1254 vendor-advisory
- 70988 vdb-entry
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10743
- openSUSE-SU-2015:0248 vendor-advisory
- https://support.apple.com/kb/HT205031
- http://curl.haxx.se/docs/adv_20141105.html