CVE-2026-19082— TONYC Imager 缓冲区错误漏洞

Imager versions from 0.45_02 before 1.034 for Perl may expose adjacent heap bytes via strlen() over-read from zero-count ASCII EXIF entries in copy_string_tags

Imager versions from 0.45_02 before 1.034 for Perl may expose adjacent heap bytes via strlen() over-read from zero-count ASCII EXIF entries in copy_string_tags. copy_string_tags() computes an ASCII EXIF tag's length as `entry->size - 1` to strip the trailing NUL. A zero-count ASCII entry sets `entry->size` to 0, and the derived length reaches i_tags_add() as -1, which is interpreted as a request to call strlen(), scanning past the entry to the next NUL and copying those bytes into the tag. JPEG reaches this path via im_decode_exif(), as does the separate Imager::File::WEBP distribution, which is fixed by upgrading Imager. Any caller of Imager->read() on an attacker-supplied image with such an entry may receive an exif_* tag holding adjacent heap bytes instead of an empty string.

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跨界内存读

TONYC Imager 缓冲区错误漏洞

TONYC Imager是TONYC个人开发者的一款嵌入式服务器。 TONYC Imager 0.45_02至1.034之前版本存在缓冲区错误漏洞，该漏洞源于copy_string_tags函数处理零计数ASCII EXIF条目时长度计算错误，导致strlen()越界读取相邻堆字节，攻击者可通过特制图像获取相邻堆字节信息。

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