Bug 1764780 (CVE-2019-18224)
Summary: | CVE-2019-18224 libidn2: heap-based buffer overflow in idn2_to_ascii_4i in lib/lookup.c | ||
---|---|---|---|
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: | mlichvar, redhat-bugzilla, vladimir.khmyrov |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | libidn2 2.1.0 | Doc Type: | If docs needed, set a value |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2021-10-25 22:12:30 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: | 1674201, 1764781, 1764782, 1764783, 1764784, 1768392 | ||
Bug Blocks: | 1764786 |
Description
Guilherme de Almeida Suckevicz
2019-10-23 17:40:34 UTC
Created libidn2 tracking bugs for this issue: Affects: epel-all [bug 1764782] Affects: fedora-all [bug 1764781] Created mingw-libidn2 tracking bugs for this issue: Affects: epel-7 [bug 1764784] Affects: fedora-all [bug 1764783] Is there a specific reason for bug #1764781 and bug #1764782, as libidn2-2.2.0-1 (or later) is shipped on all Fedora and EPEL branches for months now… (In reply to Robert Scheck from comment #2) > Is there a specific reason for bug #1764781 and bug #1764782, as > libidn2-2.2.0-1 (or later) is shipped on all Fedora and EPEL branches for > months now… Hi Robert, You can close the bug #1764781 and bug #1764782 since it's not affected. Analysis: This is essentially an overflow in the idn2_to_ascii_4i() function which converts zero terminated input Unicode (UCS-4) string. to ASCII strings and can be triggered with a very long input strings. Note: This function is however deprecated in newer versions of the library and replaced by: idn2_to_ascii_4i2() |