CVE-2018-18520

Publication date 19 October 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

An Invalid Memory Address Dereference exists in the function elf_end in libelf in elfutils through v0.174. Although eu-size is intended to support ar files inside ar files, handle_ar in size.c closes the outer ar file before handling all inner entries. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
elfutils	23.04 lunar	Not affected
	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	Fixed 0.170-0.5.0ubuntu1.1
	18.04 LTS bionic	Fixed 0.170-0.4ubuntu0.1
	16.04 LTS xenial	Fixed 0.165-3ubuntu1.2
	14.04 LTS trusty	Fixed 0.158-0ubuntu5.3+esm1 Ubuntu Pro

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Patch details

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

Package	Patch details
elfutils	Upstream: https://sourceware.org/git/?p=elfutils.git;a=commit;h=22d2d082d57a7470fadc0eae67179553f4919209

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVE-2018-18520

Cvss 3 Severity Score

Status

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Patch details

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references