Bug 1777537 (CVE-2019-19246)
| Summary: | CVE-2019-19246 oniguruma: Heap-based buffer overflow in str_lower_case_match in regexec.c | ||
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| 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: | alegrand, anpicker, bmontgom, dbecker, eparis, erooth, hhorak, jburrell, jjoyce, jkucera, jokerman, jorton, jschluet, kakkoyun, kdreyer, lcosic, lhh, lpeer, mburns, mloibl, mtasaka, no1youknowz, nstielau, palonsor, pkrupa, rcollet, ruby-maint, sclewis, slinaber, sponnaga, surbania, webstack-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | oniguruma 6.9.4 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A vulnerability was found in Oniguruma, where improper bounds checking in str_lower_case_match within regexec.c can cause a heap-based buffer overflow, a remote attacker could exploit this flaw to crash the application or, in certain scenarios, execute arbitrary code. This occurs when the application processes specially crafted regex patterns, potentially leading to unintended behavior.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-09-08 13:18:25 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: | 1777538, 1777539, 1777540, 1780460, 1780461, 1780462, 1781609, 1781610, 1781611, 1781612, 1781613, 1781614, 1781615, 1781616, 1781617, 1781618, 1781619, 1857702 | ||
| Bug Blocks: | 1777541 | ||
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Description
Guilherme de Almeida Suckevicz
2019-11-27 18:35:13 UTC
Created oniguruma tracking bugs for this issue: Affects: epel-7 [bug 1777538] Affects: fedora-all [bug 1777540] Affects: openstack-rdo [bug 1777539] The following containers are packaged with OpenShift 4.x and contain a vulnerable version of oniguruma (5.9.x): - openshift4/ose-metering-hadoop - openshift4/ose-metering-hive - openshift4/ose-metering-presto However, these containers include oniguruma but do not use it. This includes faq and jq which may use oniguruma, and are included within the containers but likewise, are unused. Using the regex provided in the upstream bug report, I can't reproduce this issue until after the following commit: https://github.com/kkos/oniguruma/commit/4d461376bd85e7994835677b2ff453a43c49cd28 I'm currently not aware of a method to trigger this in prior versions, although the additional check added to the str_lower_case_match() function as part of the upstream patch for this CVE still applies to older versions. Thus, this may very well only be a defense-in-depth patch for older versions. Apart from that, the impact of this issue appears very limited: we read a small amount of out-of-bounds heap memory. This could potentially lead to a crash, although in the vast majority of cases, it won't even do that. Furthermore, an attacker would need to be able to provide a regex to the application using oniguruma, which is usually a bad idea in itself. This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:3662 https://access.redhat.com/errata/RHSA-2020:3662 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-2019-19246 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-2020:5275 https://access.redhat.com/errata/RHSA-2020:5275 |