Leptonica 1.74.4 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.

The remote host is affected by the vulnerability described in GLSA-202312-01 (Leptonica: Multiple Vulnerabilities)

  - Leptonica 1.74.4 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-2017-18196)

  - Leptonica before 1.75.3 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-2018-7186)

  - An issue was discovered in pixHtmlViewer in prog/htmlviewer.c in Leptonica before 1.75.3. Unsanitized     input (rootname) can overflow a buffer, leading potentially to arbitrary code execution or possibly     unspecified other impact. (CVE-2018-7247)

  - An issue was discovered in Leptonica through 1.75.3. The gplotMakeOutput function allows command injection     via a $(command) approach in the gplot rootname argument. This issue exists because of an incomplete fix     for CVE-2018-3836. (CVE-2018-7440)

  - Leptonica through 1.75.3 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-2018-7441)

  - An issue was discovered in Leptonica through 1.75.3. The gplotMakeOutput function does not block '/'     characters in the gplot rootname argument, potentially leading to path traversal and arbitrary file     overwrite. (CVE-2018-7442)

  - An issue in the Leptonica linked library (v1.79.0) allows attackers to cause an arithmetic exception     leading to a Denial of Service (DoS) via a crafted JPEG file. (CVE-2022-38266)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4819-1 advisory.

    It was discovered that Leptonica incorrectly handled path names. An attacker could possibly use this issue     to obtain sensitive information. This issue only affected Ubuntu 16.04 ESM. (CVE-2017-18196)

    It was discovered that Leptonica incorrectly handled certain input arguments. An attacker could possibly     use this issue to execute arbitrary commands. (CVE-2018-3836)

    It was discovered that Leptonica incorrectly handled input arguments. An attacker could possibly use this     issue to cause a denial of service or other unspecified impact. (CVE-2018-7186)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update fixes CVE-2017-18196.

----

This update backports security fixes for CVE-2018-3836, CVE-2018-7186 and CVE-2018-7247.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
187052	GLSA-202312-01 : Leptonica: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	critical
183556	Ubuntu 16.04 ESM : Leptonica vulnerabilities (USN-4819-1)	Nessus	Ubuntu Local Security Checks	critical
108310	Fedora 27 : leptonica / mingw-leptonica (2018-cbf621a53c)	Nessus	Fedora Local Security Checks	critical
108309	Fedora 26 : leptonica / mingw-leptonica (2018-78570112db)	Nessus	Fedora Local Security Checks	critical

Detections

Analytics

CVE-2017-18196

low

Tenable Plugins

critical

critical

critical

critical