libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68
disclosure@vulncheck.com
https://github.com/libjxl/libjxl/pull/4885
disclosure@vulncheck.com
https://github.com/libjxl/libjxl/releases/tag/v0.12.0
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/libjxl-container-box-parser-integer-underf…
disclosure@vulncheck.com