- Vulnerabilities 85,576
Debian LTS: Security Advisory for ruby-websocket-extensions (DLA-2334-1)
Published: 2020-08-20 05:27:57
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
Summary:
The remote host is missing an update for the 'ruby-websocket-extensions'
Linux Distribution Package(s) announced via the DLA-2334-1 advisory.
Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.
Technical Details:
It was discovered that there was a denial of service vulnerability
in ruby-websocket-extensions, a library for managing long-lived HTTP
'WebSocket' connections.
The parser took quadratic time when parsing a header containing an
unclosed string parameter value whose content is a repeating two-byte
sequence. This could be abused by an attacker to conduct a Regex
Denial Of Service (ReDoS) on a single-threaded server by providing a
malicious payload in the Sec-WebSocket-Extensions HTTP header.
Affected Versions:
'ruby-websocket-extensions' Linux Distribution Package(s) on Debian Linux.
Recommendations:
For Debian 9 'Stretch', this problem has been fixed in version
0.1.2-1+deb9u1.
We recommend that you upgrade your ruby-websocket-extensions Linux Distribution Packages.
Solution Type:
Vendor Patch
Detection Type:
Linux Distribution Package
https://nvd.nist.gov/vuln/detail/CVE-2020-7663
https://lists.debian.org/debian-lts-announce/2020/08/msg00031.html
https://security-tracker.debian.org/tracker/DLA-2334-1
https://bugs.debian.org/964274
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