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Secunia Research 2018/12/13
libexif EXIF_IFD_INTEROPERABILITY / EXIF_IFD_EXIF
Denial of Service Vulnerability
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Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Flexera........................................................8
Verification.........................................................9
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1) Affected Software
* libexif version 0.6.21. Other versions may also be affected.
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2) Severity
Rating: Moderately critical
Impact: Denial of Service
Where: From remote
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3) Description of Vulnerability
Secunia Research has discovered a vulnerability in libexif, which can
be exploited by malicious people to cause a DoS (Denial of Service).
1) An error when processing the EXIF_IFD_INTEROPERABILITY and
EXIF_IFD_EXIF tags can be exploited to exhaust available CPU
resources.
The vulnerability is confirmed in version 0.6.21. Other versions may
also be affected.
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4) Solution
No official solution is currently available.
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5) Time Table
2018/09/12 - Maintainer contacted with the vulnerability details.
2018/09/27 - Maintainer contacted for a follow-up.
2018/09/28 - Maintainer confirmed the vulnerability.
2018/11/13 - Maintainer contacted for a follow-up highlighting
disclosure policy margins.
2018/12/12 - Release of Secunia Advisory SA84652 based on the
disclosure policy.
2018/12/13 - Public disclosure of Secunia Research Advisory.
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6) Credits
Laurent Delosieres, Secunia Research at Flexera.
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7) References
The Common Vulnerabilities and Exposures (CVE) project has assigned
the CVE-2018-20030 identifier for the vulnerability.
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8) About Flexera
Flexera helps application producers and enterprises increase
application usage and the value they derive from their software.
http://www.flexera.com
Flexera delivers market-leading Software Vulnerability Management
solutions enabling enterprises to proactively identify and
remediate software vulnerabilities, effectively reducing the risk of
costly security breaches.
https://www.flexera.com/products/software-vulnerability-management
Flexera supports and contributes to the community in several
ways. We have always believed that reliable vulnerability
intelligence and tools to aid identifying and fixing vulnerabilities
should be freely available for consumers to ensure that users,
who care about their online privacy and security, can stay secure.
Only a few vendors address vulnerabilities in a proper way and help
users get updated and stay secure. End-users (whether private
individuals or businesses) are otherwise left largely alone, and
that is why back in 2002, Secunia Research started investigating,
coordinating disclosure and verifying software vulnerabilities.
In 2016, Secunia Research became a part of Flexera and today
our in-house software vulnerability research remains the core of
the Software Vulnerability Management products at Flexera.
https://www.flexera.com/company/secunia-research/
The public Secunia Advisory database contains information for
researchers, security enthusiasts, and consumers to lookup individual
products and vulnerabilities and assess, whether they need to take
any actions to secure their systems or whether a given vulnerability
has already been discovered.
https://www.flexera.com/company/secunia-research/advisories/
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9) Verification
Please verify this advisory by visiting the website:
https://secuniaresearch.flexerasoftware.com/secunia_research/2018-28/
Complete list of vulnerability reports published by Secunia Research:
https://www.flexera.com/company/secunia-research/advisories/
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