CVE-2017-10784
The Basic authentication code in WEBrick library in Ruby before 2.2.8, 2.3.x before 2.3.5, and 2.4.x through 2.4.1 allows remote attackers to inject terminal emulator escape sequences into its log and possibly execute arbitrary commands via a crafted…
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EPSS puts the probability of exploitation in the next 30 days at 16.4%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
The Basic authentication code in WEBrick library in Ruby before 2.2.8, 2.3.x before 2.3.5, and 2.4.x through 2.4.1 allows remote attackers to inject terminal emulator escape sequences into its log and possibly execute arbitrary commands via a crafted user name.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 16.41% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- ruby-lang/ruby
- Source
- cve@mitre.org
EPSS 16.4% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/100853Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039363Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042004
- https://access.redhat.com/errata/RHSA-2017:3485
- https://access.redhat.com/errata/RHSA-2018:0378
- https://access.redhat.com/errata/RHSA-2018:0583
- https://access.redhat.com/errata/RHSA-2018:0585
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://security.gentoo.org/glsa/201710-18
- https://usn.ubuntu.com/3528-1/
- https://usn.ubuntu.com/3685-1/
- https://www.debian.org/security/2017/dsa-4031
- https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-2-8-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-3-5-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2017/09/14/webrick-basic-auth-escape-sequence-injection-cve-2017-10784/Vendor Advisory
- http://www.securityfocus.com/bid/100853Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039363Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042004
- https://access.redhat.com/errata/RHSA-2017:3485
- https://access.redhat.com/errata/RHSA-2018:0378
- https://access.redhat.com/errata/RHSA-2018:0583
- https://access.redhat.com/errata/RHSA-2018:0585
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://security.gentoo.org/glsa/201710-18
- https://usn.ubuntu.com/3528-1/
- https://usn.ubuntu.com/3685-1/
- https://www.debian.org/security/2017/dsa-4031
- https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-2-8-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-3-5-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2017/09/14/webrick-basic-auth-escape-sequence-injection-cve-2017-10784/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.