CVE-2017-7244

Publication date 23 March 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The _pcre32_xclass function in pcre_xclass.c in libpcre1 in PCRE 8.40 allows remote attackers to cause a denial of service (invalid memory read) via a crafted file.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
pcre3	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Not affected
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 2:8.38-3.1ubuntu0.1~esm2
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected

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Notes

mdeslaur

pcre32 support enabled only in pcre3/1:8.35-4 same commit as CVE-2017-7186

ccdm94

in xenial, this CVE was patched together with CVE-2017-7186, since the fixes are the same, i.e. USN-5665-1 fixes this issue without mentioning this CVE.

Patch details

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

Package	Patch details
pcre3	Upstream: https://vcs.pcre.org/pcre?view=revision&revision=1688

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H