TI-2021-10176 Aliases CVE-2021-29463

Out-of-bounds read in Exiv2::WebPImage::doWriteMetadata

LOW 27CWE-125Published 2021-04-30 · Updated 2024-10-15

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds read 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 by crashing Exiv2, if they can trick the victim into running Exiv2 on a crafted image file. 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 `insert`. The bug is fixed in version v0.27.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01119 66th percentileScored 2026-11-07

Fix Partial exiv2 (Exiv2): 0.27.4Red Hat: 1 advisoryRed Hat: 2 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Exiv2	exiv2	before 0.27.4	0.27.4	Patch available	CNA

exiv2 VendorExiv2 Affected before 0.27.4 Fixed in 0.27.4 Patch available CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:exiv2:exiv2::::::::	before 0.27.4	Vulnerable	Exiv2
cpe:2.3:o:fedoraproject:fedora:33:::::::*	33	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:::::::*	34	Vulnerable	Fedoraproject

cpe:2.3:a:exiv2:exiv2:*:*:*:*:*:*:*:* Versions before 0.27.4 Vulnerable ·Exiv2
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Fix · CNA exiv2 (Exiv2) Fixed in 0.27.4

Red Hat 1 advisory

RHSA-2021:4173 Released 2021-11-09 · Red Hat rating Moderate
exiv2 security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) exiv2-devel-0.27.4-5.el8, exiv2-doc-0.27.4-5.el8
- Red Hat Enterprise Linux AppStream (v. 8) exiv2-0.27.4-5.el8, exiv2-libs-0.27.4-5.el8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2021-04-30
exiv2 — FEDORA-2021-dde4d7d47e
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-10177 Heap buffer overflow in Exiv2::Jp2Image::encodeJp2HeaderPriority LOW 37
Show all 2 records → Advisory →
Advisory · 2021-04-30
exiv2 — FEDORA-2021-0b27f220bd
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-10177 Heap buffer overflow in Exiv2::Jp2Image::encodeJp2HeaderPriority LOW 37
Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)	Fixed	RHSA-2021:4173
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2021:4173

Not affected: 1 product

Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2021-29463

References

Patch 1

https://github.com/Exiv2/exiv2/commit/783b3a6ff15ed6f82a8f8e6c8a6f3b84a9b04d4b

Advisory 4

TI-2020-13478 Buffer Overflow vulnerability in tEXtToDataBuf function in pngimage.cpp in Exiv2 0.27.1… CVSS 3.1HIGH 7.8
TI-2025-19560 Use After Free in Exiv2 CVSS 4.0MEDIUM 5.3
TI-2020-13491 An uncontrolled memory allocation in DataBufdata(subBox.length-sizeof(box)) function of… CVSS 3.1MEDIUM 6.5
TI-2018-08245 Exiv2 0.26 has a heap-based buffer overflow in getData in preview.cpp. CVSS 3.0CRITICAL 9.8
TI-2025-33923 Exiv2 Segmentation Faults in Exiv2::EpsImage::writeMetadata() via crafted EPS file CVSS 4.0LOW 1.8
TI-2019-06608 An issue was discovered in Exiv2 0.27. CVSS 3.0HIGH 8.8

See all 123 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences