Bug 1773728 (CVE-2019-16201)
| Summary: | CVE-2019-16201 ruby: Regular expression denial of service vulnerability of WEBrick's Digest authentication | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | amasferr, chazlett, hhorak, jorton, mo, mtasaka, pvalena, ruby-maint, ruby-packagers-sig, s, strzibny, vanmeeuwen+fedora, vondruch |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | ruby 2.4.8, ruby 2.5.7, ruby 2.6.5, ruby 2.7.0 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-05-26 11:32:01 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1773729, 1784828, 1784829, 1784830, 1784831, 1784832, 1784833, 1954946, 1955049, 1957125, 2055233, 2055242 | ||
| Bug Blocks: | 1773730 | ||
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Description
Guilherme de Almeida Suckevicz
2019-11-18 19:49:28 UTC
Created ruby tracking bugs for this issue: Affects: fedora-all [bug 1773729] External References: https://www.ruby-lang.org/en/news/2019/10/01/webrick-regexp-digestauth-dos-cve-2019-16201/ Upstream patch for this issue: https://github.com/ruby/ruby/commit/36e057e26ef2104bc2349799d6c52d22bb1c7d03 commit 36e057e26ef2104bc2349799d6c52d22bb1c7d03 Author: Nobuyoshi Nakada <nobu> Date: Tue Aug 13 12:14:28 2019 +0900 Loop with String#scan without creating substrings Create the substrings necessary parts only, instead of cutting the rest of the buffer. Also removed a useless, probable typo, regexp. There's an issue with HTTPAuth when using AuthDigest mode in Ruby and webricks. When using DigestAuth HTTP authentication method, ruby uses a regular expression to split the session parameters in split_param_value() function. There's a flaw on the regular expression mentioned earlier which an attacker may leverage by sending a crafted message header which leads the regular expression to a heavily CPU consuming backtracking resulting in DoS. This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS Via RHSA-2021:2104 https://access.redhat.com/errata/RHSA-2021:2104 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2019-16201 This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS Via RHSA-2021:2230 https://access.redhat.com/errata/RHSA-2021:2230 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:2587 https://access.redhat.com/errata/RHSA-2021:2587 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:2588 https://access.redhat.com/errata/RHSA-2021:2588 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions Via RHSA-2022:0581 https://access.redhat.com/errata/RHSA-2022:0581 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2022:0582 https://access.redhat.com/errata/RHSA-2022:0582 |