critical
CVE-2016-8622
curl: URL unescape heap overflow via integer truncation
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat3.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Oracle (high), Amazon (medium), Ubuntu (medium), Red Hat (low).
Description
The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.10 | curl | 7.51.0-r0 |
| alpine 3.11 | curl | 7.51.0 |
| alpine 3.12 | curl | 7.51.0-r0 |
| alpine 3.13 | curl | 7.51.0-r0 |
| alpine 3.14 | curl | 7.51.0-r0 |
| alpine 3.15 | curl | 7.51.0-r0 |
| alpine 3.16 | curl | 7.51.0-r0 |
| alpine 3.17 | curl | 7.51.0-r0 |
| alpine 3.18 | curl | 7.51.0-r0 |
| alpine 3.19 | curl | 7.51.0-r0 |
| alpine 3.2 | curl | 7.49.1-r4 |
| alpine 3.20 | curl | 7.51.0-r0 |
Show all 57 entries from 45 sources
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.10 | curl | 7.51.0-r0 |
| alpine 3.11 | curl | 7.51.0 |
| alpine 3.12 | curl | 7.51.0-r0 |
| alpine 3.13 | curl | 7.51.0-r0 |
| alpine 3.14 | curl | 7.51.0-r0 |
| alpine 3.15 | curl | 7.51.0-r0 |
| alpine 3.16 | curl | 7.51.0-r0 |
| alpine 3.17 | curl | 7.51.0-r0 |
| alpine 3.18 | curl | 7.51.0-r0 |
| alpine 3.19 | curl | 7.51.0-r0 |
| alpine 3.2 | curl | 7.49.1-r4 |
| alpine 3.20 | curl | 7.51.0-r0 |
| alpine 3.21 | curl | 7.51.0-r0 |
| alpine 3.22 | curl | 7.51.0-r0 |
| alpine 3.23 | curl | 7.51.0-r0 |
| alpine 3.24 | curl | 7.51.0-r0 |
| alpine 3.3 | curl | 7.49.1-r4 |
| alpine 3.4 | curl | 7.51.0-r0 |
| alpine 3.5 | curl | 7.51.0-r0 |
| alpine 3.6 | curl | 7.51.0 |
| alpine 3.7 | curl | 7.51.0 |
| alpine 3.8 | curl | 7.51.0 |
| alpine 3.9 | curl | 7.51.0-r0 |
| alpine edge | curl | 7.51.0-r0 |
| amazon linux 1 | curl | 7.47.1-9.66.amzn1 |
| amazon linux 1 | curl-debuginfo | 7.47.1-9.66.amzn1 |
| amazon linux 1 | libcurl | 7.47.1-9.66.amzn1 |
| amazon linux 1 | libcurl-devel | 7.47.1-9.66.amzn1 |
| debian 11 | curl | 7.51.0-1 |
| debian 12 | curl | 7.51.0-1 |
| debian 13 | curl | 7.51.0-1 |
| debian 14 | curl | 7.51.0-1 |
| debian 7 | curl | 7.26.0-1+wheezy17 |
| debian 8 | curl | 7.38.0-4+deb8u5 |
| echo | curl | 7.51.0-1 |
| Oracle Linux 6 | curl | 7.19.7-53.0.2.el6_9 |
| Oracle Linux 6 | libcurl | 7.19.7-53.0.2.el6_9 |
| Oracle Linux 6 | libcurl-devel | 7.19.7-53.0.2.el6_9 |
| Oracle Linux 7 | curl | 7.29.0-51.0.1.el7 |
| Oracle Linux 7 | libcurl | 7.29.0-51.0.1.el7 |
| Oracle Linux 7 | libcurl-devel | 7.29.0-51.0.1.el7 |
| Red Hat | curl | no fix listed |
| Red Hat | libcurl | no fix listed |
| Red Hat | libcurl-devel | no fix listed |
| Red Hat | rh-dotnet21-curl | no fix listed |
| Red Hat | rh-dotnet21-libcurl | no fix listed |
| Red Hat | rh-dotnet21-libcurl-devel | no fix listed |
| root.io debian 11 | rootio-curl | 7.51.0-1 |
| root.io debian 12 | rootio-curl | 7.51.0-1 |
| root.io debian 13 | rootio-curl | 7.51.0-1 |
| ubuntu 12.04 | curl | 7.22.0-3ubuntu4.17 |
| ubuntu 14.04 | curl | 7.35.0-1ubuntu2.10 |
| ubuntu 14.04-ESM | curl | 7.35.0-1ubuntu2.10 |
| ubuntu 16.04 | curl | 7.47.0-1ubuntu2.2 |
| ubuntu 16.04-ESM | curl | 7.47.0-1ubuntu2.2 |
| ubuntu 16.10 | curl | 7.50.1-1ubuntu1.1 |
| ubuntu 17.04 | curl | 7.50.1-1ubuntu2 |
References
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/94105
- http://www.securitytracker.com/id/1037192
- https://access.redhat.com/errata/RHSA-2018:2486
- https://access.redhat.com/errata/RHSA-2018:3558
- https://access.redhat.com/security/cve/CVE-2016-8622
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622
- https://curl.haxx.se/docs/adv_20161102H.html
All 15 references
- https://linux.oracle.com/cve/CVE-2016-8622.html
- https://linux.oracle.com/errata/ELSA-2019-4652.html
- https://nvd.nist.gov/vuln/detail/CVE-2016-8622
- https://security.gentoo.org/glsa/201701-47
- https://ubuntu.com/security/notices/USN-3123-1
- https://www.cve.org/CVERecord?id=CVE-2016-8622
- https://www.tenable.com/security/tns-2016-21