Bug 1856747 (CVE-2020-14315) - CVE-2020-14315 bsdiff: handling external inputs allows attacker to bypass sanity checks
Summary: CVE-2020-14315 bsdiff: handling external inputs allows attacker to bypass san...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-14315
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1856748 1856749
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-07-14 11:24 UTC by Dhananjay Arunesh
Modified: 2021-02-16 19:41 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in bsdiff. Memory corruption is possible due to insufficient checks when handling external inputs allowing an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2020-07-14 13:28:00 UTC
Embargoed:

Attachments (Terms of Use)

Description Dhananjay Arunesh 2020-07-14 11:24:09 UTC 
A memory corruption vulnerability is present in bspatch as shipped in
Colin Percival’s bsdiff tools version 4.3. Insufficient checks when
handling external inputs allows an attacker to bypass the sanity
checks in place and write out of a dynamically allocated buffer
boundaries.

References:
https://www.openwall.com/lists/oss-security/2020/07/09/2
Comment 1 Dhananjay Arunesh 2020-07-14 11:24:45 UTC 
Created bsdiff tracking bugs for this issue:

Affects: epel-6 [bug 1856749]
Affects: fedora-all [bug 1856748]
Comment 2 Product Security DevOps Team 2020-07-14 13:28:00 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
Comment 3 Michael Kaplan 2020-09-11 16:31:16 UTC 
External References:

https://www.openwall.com/lists/oss-security/2020/07/09/2
https://www.x41-dsec.de/lab/advisories/x41-2020-006-bspatch/
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