NVD Vulnerability Detail

CVE-2020-25866

Summary	In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.
Publication Date	Oct. 7, 2020, 12:15 a.m.
Registration Date	Jan. 26, 2021, 10:40 a.m.
Last Update	Nov. 21, 2024, 2:18 p.m.

CVSS3.1 : HIGH
スコア	7.5
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	なし
完全性への影響(I)	なし
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	5.0
Vector	AV:N/AC:L/Au:N/C:N/I:N/A:P
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃前の認証要否(Au)	不要
機密性への影響(C)	なし
完全性への影響(I)	なし
可用性への影響(A)	低
Get all privileges.	いいえ
Get user privileges	いいえ
Get other privileges	いいえ
User operation required	いいえ

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:a:wireshark:wireshark::::::::	3.0.0	3.0.13
cpe:2.3:a:wireshark:wireshark::::::::	3.2.0	3.2.6

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*

Configuration3	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:o:opensuse:leap:15.2:::::::*

Configuration4		or higher	or less	more than	less than
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html	Mailing List Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html	Mailing List Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html	Mailing List Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html	Mailing List Third Party Advisory
5	https://gitlab.com/wireshark/wireshark/-/commit/4a948427100b6c109f4ec7b4361f0d2aec5e5c3f	Patch Third Party Advisory
6	https://gitlab.com/wireshark/wireshark/-/commit/4a948427100b6c109f4ec7b4361f0d2aec5e5c3f	Patch Third Party Advisory
7	https://gitlab.com/wireshark/wireshark/-/issues/16866	Exploit Issue Tracking Third Party Advisory
8	https://gitlab.com/wireshark/wireshark/-/issues/16866	Exploit Issue Tracking Third Party Advisory
9	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
10	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
11	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
12	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
13	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
14	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
15	https://www.oracle.com/security-alerts/cpujan2021.html	Patch Third Party Advisory
16	https://www.oracle.com/security-alerts/cpujan2021.html	Patch Third Party Advisory
17	https://www.wireshark.org/security/wnpa-sec-2020-13.html	Vendor Advisory
18	https://www.wireshark.org/security/wnpa-sec-2020-13.html	Vendor 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

Wireshark における NULL ポインタデリファレンスに関する脆弱性

Title	Wireshark における NULL ポインタデリファレンスに関する脆弱性
Summary	Wireshark 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	Sept. 23, 2020, midnight
Registration Date	April 19, 2021, 5:06 p.m.
Last Update	April 19, 2021, 5:06 p.m.

Affected System

Wireshark

Wireshark 3.0.0 から 3.0.13

Wireshark 3.2.0 から 3.2.6

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-2020-25866	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25866
National Vulnerability Database (NVD)
2	CVE-2020-25866	https://nvd.nist.gov/vuln/detail/CVE-2020-25866

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
GitLab
1	BLIP: Fix decompression buffer bug	https://gitlab.com/wireshark/wireshark/-/commit/4a948427100b6c109f4ec7b4361f0d2aec5e5c3f
Wireshark Security Advisories
2	wnpa-sec-2020-13	https://www.wireshark.org/security/wnpa-sec-2020-13.html

Change Log

No	Changed Details	Date of change
1	[2021年04月19日] 掲載	April 19, 2021, 5:06 p.m.