CVE-2021-32613: Use After Free
First published: Wed May 12 2021(Updated: )
In radare2 through 5.3.0 there is a double free vulnerability in the pyc parse via a crafted file which can lead to DoS.
Credit: patrick@puiterwijk.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| radare2 | <=5.3.0 | |
| Fedora | =33 | |
| Fedora | =34 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1959939
- https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05
- https://github.com/radareorg/radare2/commit/a07dedb804a82bc01c07072861942dd80c6b6d62
- https://github.com/radareorg/radare2/issues/18666
- https://github.com/radareorg/radare2/issues/18667
- https://github.com/radareorg/radare2/issues/18679
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W3LPB5VGCIA7WA55FSB3YZQFUGZKWD7O/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y3S7JB46PONPHXZHIMR2XDPLGJCN5ZIX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3LPB5VGCIA7WA55FSB3YZQFUGZKWD7O/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3S7JB46PONPHXZHIMR2XDPLGJCN5ZIX/
- https://github.com/radareorg/radare2/commit/049de62730f4954ef9a642f2eeebbca30a8eccdc
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1959941
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1959940
Frequently Asked Questions
What is the severity of CVE-2021-32613?
CVE-2021-32613 is classified as a medium severity vulnerability due to its potential for denial of service (DoS).
How do I fix CVE-2021-32613?
To fix CVE-2021-32613, upgrade radare2 to version 5.4.0 or later where the vulnerability is patched.
What causes the vulnerability in CVE-2021-32613?
The vulnerability in CVE-2021-32613 is caused by a double free in the pyc parser when handling specially crafted files.
Which versions of radare2 are affected by CVE-2021-32613?
CVE-2021-32613 affects radare2 versions up to and including 5.3.0.
Can CVE-2021-32613 lead to data loss?
CVE-2021-32613 specifically can lead to a denial of service (DoS) but does not directly cause data loss.
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