CVE-2018-7648

Publication date 2 March 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

An issue was discovered in mj2/opj_mj2_extract.c in OpenJPEG 2.3.0. The output prefix was not checked for length, which could overflow a buffer, when providing a prefix with 50 or more characters on the command line.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openjpeg	17.10 artful	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
openjpeg2	17.10 artful	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

sbeattie

-DBUILD_MJ2:BOOL=OFF is set in Ubuntu and Debian packaging, so code affected is not built.

ccdm94

-DBUILD_MJ2 is set to ON in openjpeg, however, the vulnerable code is not present in this package since the file received as an argument is not processed in the same way as it is in openjpeg2, it is simply used as is.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
openjpeg	Upstream: cc38247
openjpeg2	Upstream: cc38247

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H