Bug 1841189 (CVE-2020-13396)
Summary: | CVE-2020-13396 freerdp: Out-of-bounds read in ntlm_read_ChallengeMessage in winpr/libwinpr/sspi/NTLM/ntlm_message.c. | ||
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Product: | [Other] Security Response | Reporter: | Michael Kaplan <mkaplan> |
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
Status: | CLOSED ERRATA | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | mads, negativo17, oholy, pahan |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | freerdp 2.1.1 | Doc Type: | If docs needed, set a value |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2020-09-29 22:01:30 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: | 1841190, 1841191, 1841935, 1841936 | ||
Bug Blocks: | 1841202 |
Description
Michael Kaplan
2020-05-28 15:40:49 UTC
Created freerdp tracking bugs for this issue: Affects: epel-all [bug 1841190] Created freerdp1.2 tracking bugs for this issue: Affects: fedora-all [bug 1841191] The patch adds length checking by computing the StartOffset and PayloadOffset with Stream_GetPosition(s) instead of Stream_Pointer(s), then computing the length of the buffer to allocate from those. Also, a NULL check was added prior to copying from stream into buffer. Lastly, The offset and length variables were changed to size_t types. From this info, it looks like that stream pointer could have been pointing to a position which caused an out-of-bounds read of the buffer from within ntlm_read_ChallengeMessage prior to this patch. This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:4031 https://access.redhat.com/errata/RHSA-2020:4031 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-2020-13396 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:4647 https://access.redhat.com/errata/RHSA-2020:4647 |