Bug 1988980 (CVE-2020-19716) - CVE-2020-19716 exiv2: buffer overflow in Databuf function in types.cpp leads to DoS
Summary: CVE-2020-19716 exiv2: buffer overflow in Databuf function in types.cpp leads ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-19716
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: 1988981
Blocks: 1988983
TreeView+ depends on / blocked
 
Reported: 2021-08-02 08:28 UTC by Dhananjay Arunesh
Modified: 2021-08-06 17:10 UTC (History)
3 users (show)

Fixed In Version: exiv2 0.27.3
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Doc Text:
There's a flaw in exiv2. An attacker able to submit a crafted file to an application linked with exiv2 could trigger excessive resource consumption or a null pointer dereference, leading to an impact to application availability.
Clone Of:
Environment:
Last Closed: 2021-08-06 01:07:49 UTC
Embargoed:

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Description Dhananjay Arunesh 2021-08-02 08:28:38 UTC 
A buffer overflow vulnerability in the Databuf function in types.cpp of Exiv2
v0.27.1 leads to a denial of service (DOS).

References:
https://github.com/Exiv2/exiv2/issues/980
Comment 1 Dhananjay Arunesh 2021-08-02 08:28:57 UTC 
Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1988981]
Comment 2 Product Security DevOps Team 2021-08-06 01:07:49 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-19716
Comment 4 Todd Cullum 2021-08-06 17:05:15 UTC 
Flaw summary:

In rafimage.cpp, Exiv2::DataBuf::DataBuf() attempts to allocate (via `new`) a buffer of `size`. As `size` is controlled by an input file, it could be too large in which case it will either cause a giant allocation or failure, resulting in NULL pointer. There is no check for NULL prior to calling std::memcpy() and attempting to write data to the buffer. This could lead to a crash of the application linked with the exiv2 library.
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