CVE-2021-29623 - CVE House

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Status published Low CVE-2021-29623

Uninitialized variable bug in Exiv2

3.6 CVSS

Vulnerability Description

Exiv2 is a C++ library and a command-line utility to read, write, delete and modify Exif, IPTC, XMP and ICC image metadata. A read of uninitialized memory was found in Exiv2 versions v0.27.3 and earlier. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. The read of uninitialized memory is triggered when Exiv2 is used to read the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to leak a few bytes of stack memory, if they can trick the victim into running Exiv2 on a crafted image file. The bug is fixed in version v0.27.4.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from Exiv2

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Exiv2 has quadratic performance in ICC profile parsing in JpegBase::readMetadata

Exiv2 Segmentation Faults in Exiv2::EpsImage::writeMetadata() via crafted EPS file

Use After Free in Exiv2

Exiv2 has an out-of-bounds read in AsfVideo::streamProperties

Denial of service due to unbounded recursion in QuickTimeVideo::multipleEntriesDecoder in Exiv2

Affected Vendor

Exiv2

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Affected Software

exiv2

Vulnerable Versions:

< v0.27.4

Timeline

Official Publish: May 13th, 2021

Last Modified: August 3rd, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1203 Exploitation for Client Execution

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1499.003 Application Exhaustion Flood