Bug 1934088 (CVE-2021-3420) - CVE-2021-3420 newlib: improper validation in memory allocation functions could lead to heap-based buffer overflow
Summary: CVE-2021-3420 newlib: improper validation in memory allocation functions coul...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-3420
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: 1934089
Blocks: 1934090
TreeView+ depends on / blocked
 
Reported: 2021-03-02 13:47 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-03-12 08:21 UTC (History)
1 user (show)

Fixed In Version: newlib 4.0.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.
Clone Of:
Environment:
Last Closed: 2021-03-02 19:02:12 UTC


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Description Guilherme de Almeida Suckevicz 2021-03-02 13:47:09 UTC
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.

Reference and upstream patch:
https://sourceware.org/git/?p=newlib-cygwin.git;a=commit;h=aa106b29a6a8a1b0df9e334704292cbc32f2d44e

Comment 1 Guilherme de Almeida Suckevicz 2021-03-02 13:47:25 UTC
Created arm-none-eabi-newlib tracking bugs for this issue:

Affects: fedora-all [bug 1934089]

Comment 2 Product Security DevOps Team 2021-03-02 19:02:12 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.


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