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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. 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{"affected_release": [{"advisory": "RHSA-2021:4173", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "exiv2-0:0.27.4-5.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-11-09T00:00:00Z"}], "bugzilla": {"description": "exiv2: Out-of-bounds read in Exiv2::Jp2Image::encodeJp2Header", "id": "1953708", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1953708"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-125", "details": ["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.", "A flaw was found in exiv2. An out-of-bounds read in the Exiv2::Jp2Image::encodeJp2Header function may allow a remote attacker to crash an application using exiv2 library. The highest threat from this vulnerability is to application availability."], "name": "CVE-2021-29470", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "exiv2", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "compat-exiv2-023", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "compat-exiv2-026", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "exiv2", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "compat-exiv2-026", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "exiv2", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-04-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-29470\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-29470\nhttps://github.com/Exiv2/exiv2/security/advisories/GHSA-8949-hhfh-j7rj"], "threat_severity": "Moderate", "upstream_fix": "exiv2 0.27.4"}