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AUSCERT External Security Bulletin Redistribution
ESB-2021.1310
libebml security update
19 April 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libebml
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3405
Original Bulletin:
https://www.debian.org/lts/security/2021/dla-2629
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Debian LTS Advisory DLA-2629-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Thorsten Alteholz
April 18, 2021 https://wiki.debian.org/LTS
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Package : libebml
Version : 1.3.4-1+deb9u2
CVE ID : CVE-2021-3405
A heap overflow issue was detected in libebml, a library to read and
write files in the EBML format, a binary pendant to XML.
These issues appeared in several ReadData functions of various data type
classes. This update also fixes the issue in EbmlString::ReadData and
EbmlUnicodeString::ReadData, which were mentioned in CVE-2021-3405.
For Debian 9 stretch, this problem has been fixed in version
1.3.4-1+deb9u2.
We recommend that you upgrade your libebml packages.
For the detailed security status of libebml please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/libebml
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
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Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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