Vulnerability in Golang Go
CVE-2015-5739
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."
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.096 (95.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.096 · newest: 0.096 · change: 0.000
Affected products
- Golang Go
- Fedoraproject Fedora — versions 21, 22
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.2, 7.3, 7.4
- Red Hat Enterprise Linux Server Eus — versions 7.2, 7.3, 7.4
- Red Hat Enterprise Linux Server Tus — versions 7.2, 7.3, 7.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- seclists.org/oss-sec/2015/q3/292 (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2016-1538.html (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- seclists.org/oss-sec/2015/q3/294 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/oss-sec/2015/q3/237 (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/76281 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9 (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2015-5739?
- CVE-2015-5739 is a critical-severity vulnerability in Golang Go, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 9.8/10. Published 2017-10-18.
- How severe is CVE-2015-5739?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2015-5739 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.