SB2021051035 - Ubuntu update for exiv2
Published: May 10, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Heap-based buffer overflow (CVE-ID: CVE-2021-29457)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error. A remote attacker can trick the victim top open a specially crafted image, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
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`.
2) Out-of-bounds read (CVE-ID: CVE-2021-29458)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the Exiv2::Internal::CrwMap::encode() function. A remote attacker can pass a specially crafted file to the application and perform a denial of service attack.
3) Out-of-bounds read (CVE-ID: CVE-2021-29470)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in Exiv2::Jp2Image::encodeJp2Header(). A remote attacker can pass specially crafted file to the application and perform a denial of service (DoS) attack.
4) Buffer overflow (CVE-ID: CVE-2021-3482)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing EXIF data in Jp2Image::readMetadata() in jp2image.cpp. A remote attacker can create a specially crafted EXIF document, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.