Bug 774471 (CVE-2021-3420)

Summary:	<sys-libs/newlib-4.0.0: heap buffer overflow vulnerability (CVE-2021-3420)
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	trivial	CC:	lu_zero, toolchain
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:	~4 [noglsa]
Package list:		Runtime testing required:	---

Description John Helmert III archtester

2021-03-06 15:34:03 UTC

CVE-2021-3420:

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.

Patch: https://sourceware.org/git/?p=newlib-cygwin.git;a=commit;h=aa106b29a6a8a1b0df9e334704292cbc32f2d44e


Please cleanup.

Comment 1 Larry the Git Cow gentoo-dev

2021-03-06 19:31:11 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5c22741a8324665e9caafb2b9342f9908945760a

commit 5c22741a8324665e9caafb2b9342f9908945760a
Author:     Sergei Trofimovich <slyfox@gentoo.org>
AuthorDate: 2021-03-06 19:30:37 +0000
Commit:     Sergei Trofimovich <slyfox@gentoo.org>
CommitDate: 2021-03-06 19:31:07 +0000

    sys-libs/newlib: drop old
    
    Bug: https://bugs.gentoo.org/774471
    Package-Manager: Portage-3.0.16, Repoman-3.0.2
    Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

 sys-libs/newlib/Manifest               |   2 -
 sys-libs/newlib/newlib-3.3.0-r1.ebuild | 154 ---------------------------------
 sys-libs/newlib/newlib-3.3.0.ebuild    | 150 --------------------------------
 sys-libs/newlib/newlib-4.0.0.ebuild    | 154 ---------------------------------
 4 files changed, 460 deletions(-)

Comment 2 John Helmert III archtester

2021-03-07 15:20:34 UTC

Thank you! All done.