exiv2: CVE-2021-32617

Debian Bug report logs - #988731
exiv2: CVE-2021-32617

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: exiv2: CVE-2021-32617

Date: Tue, 18 May 2021 20:45:08 +0200

Source: exiv2
Version: 0.27.3-3
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for exiv2.

CVE-2021-32617[0]:
| Exiv2 is a command-line utility and C++ library for reading, writing,
| deleting, and modifying the metadata of image files. An inefficient
| algorithm (quadratic complexity) was found in Exiv2 versions v0.27.3
| and earlier. The inefficient algorithm is triggered when Exiv2 is used
| to write metadata into a crafted image file. An attacker could
| potentially exploit the vulnerability to cause a denial of service, if
| they can trick the victim into running Exiv2 on a crafted image file.
| The bug is fixed in version v0.27.4. Note that this bug is only
| triggered when _writing_ the metadata, which is a less frequently used
| Exiv2 operation than _reading_ the metadata. For example, to trigger
| the bug in the Exiv2 command-line application, you need to add an
| extra command-line argument such as `rm`.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-32617
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32617
[1] https://github.com/Exiv2/exiv2/security/advisories/GHSA-w8mv-g8qq-36mj
[2] https://github.com/Exiv2/exiv2/pull/1657

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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