Bug 1810719 (CVE-2020-1751) - CVE-2020-1751 glibc: array overflow in backtrace functions for powerpc
Summary: CVE-2020-1751 glibc: array overflow in backtrace functions for powerpc
Keywords:
Status: NEW
Alias: CVE-2020-1751
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: 1813399 1811589
Blocks: 1810721
TreeView+ depends on / blocked
 
Reported: 2020-03-05 19:08 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-05-06 12:23 UTC (History)
17 users (show)

Fixed In Version: glibc 2.31
Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds write vulnerability was found in glibc when handling signal trampolines on PowerPC. The backtrace function did not properly check the array bounds when storing the frame address resulting in a denial of service or potential code execution. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed:


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Description Guilherme de Almeida Suckevicz 2020-03-05 19:08:02 UTC
When unwinding through a signal frame the backtrace function on PowerPC didn't check array bounds when storing the frame address.

Reference:
https://sourceware.org/bugzilla/show_bug.cgi?id=25423

Upstream commit:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d93769405996dfc11d216ddbe415946617b5a494

Comment 1 Michael Kaplan 2020-03-09 10:01:47 UTC
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1811589]

Comment 5 Mauro Matteo Cascella 2020-04-17 14:09:50 UTC
Statement:

This flaw did not affect the versions of `glibc` as shipped with Red Hat Enterprise Linux 5, 6, and 7, as they did not include the vulnerable code, which was introduced in a later version of the package.


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