NVD Vulnerability Detail

CVE-2021-27815

Summary	NULL Pointer Deference in the exif command line tool, when printing out XML formatted EXIF data, in exif v0.6.22 and earlier allows attackers to cause a Denial of Service (DoS) by uploading a malicious JPEG file, causing the application to crash.
Publication Date	April 14, 2021, 11:15 p.m.
Registration Date	April 15, 2021, 2:04 p.m.
Last Update	Nov. 21, 2024, 2:58 p.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:libexif_project:exif::::::::			0.6.22

Related information, measures and tools

No	URL	タグ
1	https://github.com/libexif/exif/commit/eb84b0e3c5f2a86013b6fcfb800d187896a648fa	Patch Third Party Advisory
2	https://github.com/libexif/exif/commit/eb84b0e3c5f2a86013b6fcfb800d187896a648fa	Patch Third Party Advisory
3	https://github.com/libexif/exif/commit/f6334d9d32437ef13dc902f0a88a2be0063d9d1c	Patch Third Party Advisory
4	https://github.com/libexif/exif/commit/f6334d9d32437ef13dc902f0a88a2be0063d9d1c	Patch Third Party Advisory
5	https://github.com/libexif/exif/issues/4	Exploit Third Party Advisory
6	https://github.com/libexif/exif/issues/4	Exploit Third Party Advisory
7	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JSWAXZVNXYLV3E4R6YQTEGRGMGWEAR76/
8	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JSWAXZVNXYLV3E4R6YQTEGRGMGWEAR76/
9	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QMC6OTXZRPCUD3LOSWO4ISR7CH7NJQDT/
10	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QMC6OTXZRPCUD3LOSWO4ISR7CH7NJQDT/
11	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZQ3L45F7S7PQPG5HEHXOCGNOO64MJOS/
12	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZQ3L45F7S7PQPG5HEHXOCGNOO64MJOS/
13	https://security.gentoo.org/glsa/202210-28	Third Party Advisory
14	https://security.gentoo.org/glsa/202210-28	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-476	NULL ポインタデリファレンス	https://cwe.mitre.org/data/definitions/476.html

JVN Vulnerability Information

exif における NULL ポインタデリファレンスに関する脆弱性

Title	exif における NULL ポインタデリファレンスに関する脆弱性
Summary	exif には、NULL ポインタデリファレンスに関する脆弱性が存在します。
Possible impacts	サービス運用妨害 (DoS) 状態にされる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	Feb. 25, 2021, midnight
Registration Date	Dec. 15, 2021, 6 p.m.
Last Update	Dec. 15, 2021, 6 p.m.

Affected System

Fedora Project

Fedora

libexif

exif 0.6.22 およびそれ以前

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2021-27815	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27815
National Vulnerability Database (NVD)
2	CVE-2021-27815	https://nvd.nist.gov/vuln/detail/CVE-2021-27815

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-476	http://cwe.mitre.org/data/definitions/476.html

ベンダー情報

No	Name	URL
Fedora Update Notification
1	FEDORA-2021-04f7b000fa	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JSWAXZVNXYLV3E4R6YQTEGRGMGWEAR76/
2	FEDORA-2021-477809f45f	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZQ3L45F7S7PQPG5HEHXOCGNOO64MJOS/
3	FEDORA-2021-b2bd2b1d13	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMC6OTXZRPCUD3LOSWO4ISR7CH7NJQDT/
GitHub
4	actually return empty stringand not 'em,pty string' as expected	https://github.com/libexif/exif/commit/eb84b0e3c5f2a86013b6fcfb800d187896a648fa
5	added empty strign check, which would lead to NULL ptr deref/crash in	https://github.com/libexif/exif/commit/f6334d9d32437ef13dc902f0a88a2be0063d9d1c
6	NullPointer in actions.c:701:7 #4	https://github.com/libexif/exif/issues/4

Change Log

No	Changed Details	Date of change
1	[2021年12月15日] 掲載	Dec. 15, 2021, 6 p.m.