Bug 1295385 (CVE-2016-1283)
| Summary: | CVE-2016-1283 pcre: heap buffer overflow in handling of duplicate named groups (8.39/14) | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Adam Mariš <amaris> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | carnil, jorton, lkundrak, mmaslano, ppisar, rcollet, rmeggins, sardella, slawomir, webstack-team, yozone |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | pcre 8.39 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-05-26 12:03:56 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: | 1295386, 1330490, 1330491, 1330494 | ||
| Bug Blocks: | 1295388 | ||
Created pcre tracking bugs for this issue: Affects: fedora-all [bug 1295386] As noted in the upstream bug, I would reduce the pattern triggering the issue down to: /((?J)(?'R'(?'R'(?'R'(?'R'(?'R'(?|(\k'R'))))))))/ This issue was introduced in version 8.34, which refactored named group handling code and apparently several bugs were introduced in the process. Upstream fix: http://vcs.pcre.org/pcre?view=revision&revision=1636 pcre-8.38-6.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report. pcre-8.38-3.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report. This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS Red Hat Software Collections for Red Hat Enterprise Linux 6 Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS Via RHSA-2016:1132 https://access.redhat.com/errata/RHSA-2016:1132 |
It was found that pcre_compile2 function in pcre_compile.c in PCRE 8.38 mishandles the /((?:F?+(?:^(?(R)a+\"){99}-))(?J)(?'R'(?'R'<((?'RR'(?'R'\){97)?J)?J)(?'R'(?'R'\){99|(:(?|(?'R')(\k'R')|((?'R')))H'R'R)(H'R))))))/ pattern and related patterns with named subgroups, which allows remote attackers to cause a denial of service via heap-based buffer overflow. Upstream bug: https://bugs.exim.org/show_bug.cgi?id=1767