Bug 1837988 (CVE-2020-10878)
| Summary: | CVE-2020-10878 perl: corruption of intermediate language state of compiled regular expression due to integer overflow leads to DoS | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | msiddiqu |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | caillon+fedoraproject, chorn, cwarfiel, iarnell, jplesnik, kasal, kyoshida, mmaslano, pdwyer, perl-devel, perl-maint-list, rhughes, sandmann, security-response-team, snavale, spotrh, tvainio |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | perl 5.30.3, perl 5.28.3 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-02-02 14:41:41 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: | 1839275, 1839276, 1839277, 1844663, 1929868, 1933099, 1938329, 1972191, 1972192 | ||
| Bug Blocks: | 1838017 | ||
|
Description
msiddiqu
2020-05-20 10:34:23 UTC
Acknowledgments: Name: Hugo van der Sanden, Slaven Rezic (In reply to Todd Cullum from comment #5) > Mitigation: > > To mitigate this flaw, developers should not pass untrusted or uncontrolled > data to the Perl regular expression engine; especially in cases where the > regular expression is used in input sanitization, validation, or filtering. This flaw is about compiling an untrusted regular expression. Not about a matching an untrusted text. Mitigation: To mitigate this flaw, developers should not allow untrusted regular expressions to be compiled by the Perl regular expression compiler. This flaw is caused by code in the Perl regex compiler, which allowed an integer overflow of U16_MAX for certain regular expressions, in regcomp.c's S_study_chunk() or Perl_re_op_compile() routines. The patch locations are different for various affected versions, but involve checking for overflow of U16_MAX. Upstream notes that I32_MAX may be smaller than U16_MAX on some CRAY machines. Upstream Patches: https://github.com/perl/perl5/commit/0a320d753fe7fca03df259a4dfd8e641e51edaa8 https://github.com/perl/perl5/commit/3295b48defa0f8570114877b063fe546dd348b3c References: https://github.com/Perl/perl5/blob/blead/pod/perl5303delta.pod https://github.com/Perl/perl5/compare/v5.30.2...v5.30.3 Created perl tracking bugs for this issue: Affects: fedora-all [bug 1844663] The fixes are now published in Perl versions 5.28.3 and 5.30.3. https://metacpan.org/pod/release/XSAWYERX/perl-5.28.3/pod/perldelta.pod https://metacpan.org/pod/release/XSAWYERX/perl-5.30.3/pod/perldelta.pod This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:0343 https://access.redhat.com/errata/RHSA-2021:0343 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-2020-10878 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.6 Extended Update Support Via RHSA-2021:0883 https://access.redhat.com/errata/RHSA-2021:0883 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Extended Update Support Via RHSA-2021:1032 https://access.redhat.com/errata/RHSA-2021:1032 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.4 Advanced Update Support Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions Red Hat Enterprise Linux 7.4 Telco Extended Update Support Via RHSA-2021:1266 https://access.redhat.com/errata/RHSA-2021:1266 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1678 https://access.redhat.com/errata/RHSA-2021:1678 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:2792 https://access.redhat.com/errata/RHSA-2021:2792 |