CVE-2015-5739
9.8
CRITICAL · CVSS 3.0 · EPSS 9.6% (pctl 95)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allows remote attackers to conduct HTTP request smuggling attacks via a space instead of a hyphen, as demonstrated by "Content Length" instead of "Content-Length."
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 9.63% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-444 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2017-10-18 |
| Last modified | 2026-06-17 |
Affected (6)
| Vendor | Product |
|---|---|
| fedoraproject | fedora |
| golang | go |
| redhat | enterprise linux server |
| redhat | enterprise linux server aus |
| redhat | enterprise linux server eus |
| redhat | enterprise linux server tus |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html
- http://rhn.redhat.com/errata/RHSA-2016-1538.html
- http://seclists.org/oss-sec/2015/q3/237
- http://seclists.org/oss-sec/2015/q3/292
- http://seclists.org/oss-sec/2015/q3/294
- http://www.securityfocus.com/bid/76281
- https://bugzilla.redhat.com/show_bug.cgi?id=1250352
- https://github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html
- http://rhn.redhat.com/errata/RHSA-2016-1538.html
- http://seclists.org/oss-sec/2015/q3/237
- http://seclists.org/oss-sec/2015/q3/292
- http://seclists.org/oss-sec/2015/q3/294
- http://www.securityfocus.com/bid/76281
- https://bugzilla.redhat.com/show_bug.cgi?id=1250352
- https://github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9
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