| Package | leptonlib |
|---|---|
| Version | 1.74.1-1+deb9u2 (stretch) |
| Related CVEs | CVE-2017-18196 CVE-2018-3836 CVE-2018-7186 CVE-2018-7441 CVE-2018-7442 CVE-2022-38266 |
This update fixes several issues related to unsafe processing of untrusted input and dealing with predictable paths below /tmp. Part of the affected functionality is primarily intended for debugging leptonlib. This functionality has been disabled rather than fixed. It can reenabled by issuing a call to setLeptDebugOK(1). This change in behaviour was performed upstream and in Debian 10 and later.
CVE-2017-18196
Leptonica constructs unintended pathnames (containing duplicated path
components) when operating on files in /tmp subdirectories, which might
allow local users to bypass intended file restrictions by leveraging access
to a directory located deeper within the /tmp directory tree, as
demonstrated by /tmp/ANY/PATH/ANY/PATH/input.tif.
CVE-2018-3836
An exploitable command injection vulnerability exists in the
gplotMakeOutput function. A specially crafted gplot rootname argument can
cause a command injection resulting in arbitrary code execution. An
attacker can provide a malicious path as input to an application that
passes attacker data to this function to trigger this vulnerability.
CVE-2018-7186
Leptonica does not limit the number of characters in a %s format argument
to fscanf or sscanf, which allows remote attackers to cause a denial of
service (stack-based buffer overflow) or possibly have unspecified other
impact via a long string, as demonstrated by the gplotRead and
ptaReadStream functions.
CVE-2018-7441
Leptonica uses hardcoded /tmp pathnames, which might allow local users to
overwrite arbitrary files or have unspecified other impact by creating
files in advance or winning a race condition, as demonstrated by
/tmp/junk_split_image.ps in prog/splitimage2pdf.c.
CVE-2018-7442
The gplotMakeOutput function does not block '/' characters in the gplot
rootname argument, potentially leading to path traversal and arbitrary file
overwrite.
CVE-2022-38266
An issue in the Leptonica linked library allows attackers to cause an
arithmetic exception leading to a Denial of Service (DoS) via a crafted
JPEG file.
For Debian 9 stretch, these problems have been fixed in version 1.74.1-1+deb9u2.
We recommend that you upgrade your leptonlib packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.