CVE-2020-3284
| Summary |
A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device. The PXE boot loader is part of the BIOS and runs over the management interface of hardware platforms that are running Cisco IOS XR Software only. The vulnerability exists because internal commands that are issued when the PXE network boot process is loading a software image are not properly verified. An attacker could exploit this vulnerability by compromising the PXE boot server and replacing a valid software image with a malicious one. Alternatively, the attacker could impersonate the PXE boot server and send a PXE boot reply with a malicious file. A successful exploit could allow the attacker to execute unsigned code on the affected device. Note: To fix this vulnerability, both the Cisco IOS XR Software and the BIOS must be upgraded. The BIOS code is included in Cisco IOS XR Software but might require additional installation steps. For further information, see the Fixed Software section of this advisory.
|
| Publication Date |
Nov. 7, 2020, 4:15 a.m. |
| Registration Date |
Jan. 26, 2021, 11:57 a.m. |
| Last Update |
Nov. 21, 2024, 2:30 p.m. |
|
CVSS3.1 : CRITICAL
|
| スコア |
9.8
|
| Vector |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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) |
高 |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
高 |
|
CVSS2.0 : HIGH
|
| Score |
9.3
|
| Vector |
AV:N/AC:M/Au:N/C:C/I:C/A:C |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
中 |
| 攻撃前の認証要否(Au) |
不要 |
| 機密性への影響(C) |
高 |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
高 |
| 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:o:cisco:a9k-rsp880-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
10.65 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a9k-rsp880-se:-:*:*:*:*:*:*:* |
| Configuration2 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a9k-rsp880-tr_firmware:*:*:*:*:*:*:*:* |
|
|
|
10.65 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a9k-rsp880-tr:-:*:*:*:*:*:*:* |
| Configuration3 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a99-rp2-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
14.35 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a99-rp2-se:-:*:*:*:*:*:*:* |
| Configuration4 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a99-rp2-tr_firmware:*:*:*:*:*:*:*:* |
|
|
|
14.35 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a99-rp2-tr:-:*:*:*:*:*:*:* |
| Configuration5 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a99-rsp-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
16.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a99-rsp-se:-:*:*:*:*:*:*:* |
| Configuration6 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a99-rsp-tr_firmware:*:*:*:*:*:*:*:* |
|
|
|
16.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a99-rsp-tr:-:*:*:*:*:*:*:* |
| Configuration7 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a9k-rsp880-lt-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
17.34 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a9k-rsp880-lt-se:-:*:*:*:*:*:*:* |
| Configuration8 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a9k-rsp880-lt-tr_firmware:*:*:*:*:*:*:*:* |
|
|
|
17.34 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a9k-rsp880-lt-tr:-:*:*:*:*:*:*:* |
| Configuration9 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:asr-9901-rp_firmware:*:*:*:*:*:*:*:* |
|
|
|
22.20 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:asr-9901-rp:-:*:*:*:*:*:*:* |
| Configuration10 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a99-rp3-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
30.23 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a99-rp3-se:-:*:*:*:*:*:*:* |
| Configuration11 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a99-rp3-tr_firmware:*:*:*:*:*:*:*:* |
|
|
|
30.23 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a99-rp3-tr:-:*:*:*:*:*:*:* |
| Configuration12 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a9k-rsp5-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
31.20 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a9k-rsp5-se:-:*:*:*:*:*:*:* |
| Configuration13 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:a9k-rsp5-tr_firmware:*:*:*:*:*:*:*:* |
|
|
|
31.20 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:a9k-rsp5-tr:-:*:*:*:*:*:*:* |
| Configuration14 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs1001_firmware:*:*:*:*:*:*:*:* |
|
|
|
14.60 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs1001:-:*:*:*:*:*:*:* |
| Configuration15 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs1002_firmware:*:*:*:*:*:*:*:* |
|
|
|
14.60 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs1002:-:*:*:*:*:*:*:* |
| Configuration16 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs1004_firmware:*:*:*:*:*:*:*:* |
|
|
|
14.60 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs1004:-:*:*:*:*:*:*:* |
| Configuration17 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n540-12z20g-sys-a\/d_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.15 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
7.2.1 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n540-12z20g-sys-a\/d:-:*:*:*:*:*:*:* |
| Configuration18 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n540-24z8q2c-m_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.15 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n540-24z8q2c-m:-:*:*:*:*:*:*:* |
| Configuration19 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n540-28z4c-sys-a\/d_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.15 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n540-28z4c-sys-a\/d:-:*:*:*:*:*:*:* |
| Configuration20 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n540-acc-sys_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.15 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n540-acc-sys:-:*:*:*:*:*:*:* |
| Configuration21 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n540x-16z4g8q2c-a\/d_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.15 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n540x-16z4g8q2c-a\/d:-:*:*:*:*:*:*:* |
| Configuration22 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n540x-12z16g-sys-a\/d_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.15 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.5.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n540x-12z16g-sys-a\/d:-:*:*:*:*:*:*:* |
| Configuration23 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n560-4-sys_firmware:*:*:*:*:*:*:*:* |
|
|
|
0.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
7.0.0 |
|
|
7.0.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n560-4-sys:-:*:*:*:*:*:*:* |
| Configuration24 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n560-7-sys_firmware:*:*:*:*:*:*:*:* |
|
|
|
0.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
7.0.0 |
|
|
7.0.2 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n560-7-sys:-:*:*:*:*:*:*:* |
| Configuration25 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n560-4-sys_firmware:*:*:*:*:*:*:*:* |
|
|
|
0.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n560-4-sys:-:*:*:*:*:*:*:* |
| Configuration26 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:n560-7-sys_firmware:*:*:*:*:*:*:*:* |
|
|
|
0.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:n560-7-sys:-:*:*:*:*:*:*:* |
| Configuration27 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs5001_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.13 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
7.2.1 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs5001:-:*:*:*:*:*:*:* |
| Configuration28 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs5002_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.13 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
7.2.1 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs5002:-:*:*:*:*:*:*:* |
| Configuration29 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs5011_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.14 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
7.2.1 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs5011:-:*:*:*:*:*:*:* |
| Configuration30 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:nc55-rp_firmware:*:*:*:*:*:*:*:* |
|
|
|
9.30 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:nc55-rp:-:*:*:*:*:*:*:* |
| Configuration31 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:nc55-rp-e_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.21 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:nc55-rp-e:-:*:*:*:*:*:*:* |
| Configuration32 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-5501_firmware:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
1.21 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-5501:-:*:*:*:*:*:*:* |
| Configuration33 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-5501-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.21 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-5501-se:-:*:*:*:*:*:*:* |
| Configuration34 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-5502_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.21 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-5502:-:*:*:*:*:*:*:* |
| Configuration35 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-5502-se_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.21 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-5502-se:-:*:*:*:*:*:*:* |
| Configuration36 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a2-mod-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a2-mod-s:-:*:*:*:*:*:*:* |
| Configuration37 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a2-mod-hd-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a2-mod-hd-s:-:*:*:*:*:*:*:* |
| Configuration38 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a2-mod-hx-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a2-mod-hx-s:-:*:*:*:*:*:*:* |
| Configuration39 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a2-mod-se-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a2-mod-se-s:-:*:*:*:*:*:*:* |
| Configuration40 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a2-mod-se-h-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a2-mod-se-h-s:-:*:*:*:*:*:*:* |
| Configuration41 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a1-36h-se-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a1-36h-se-s:-:*:*:*:*:*:*:* |
| Configuration42 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a1-36h-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a1-36h-s:-:*:*:*:*:*:*:* |
| Configuration43 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a1-24h_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a1-24h:-:*:*:*:*:*:*:* |
| Configuration44 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs55-a1-48q6h_firmware:*:*:*:*:*:*:*:* |
|
|
|
1.12 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs55-a1-48q6h:-:*:*:*:*:*:*:* |
| Configuration45 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:cisco:ncs-55a1-24q6h-s_firmware:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* |
|
|
|
6.6.25 |
| execution environment |
| 1 |
cpe:2.3:h:cisco:ncs-55a1-24q6h-s:-:*:*:*:*:*:*:* |
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
Cisco IOS XR 64-bit 用 enhanced Preboot eXecution Environment boot loader における脆弱性
| Title |
Cisco IOS XR 64-bit 用 enhanced Preboot eXecution Environment boot loader における脆弱性
|
| Summary |
Cisco IOS XR 64-bit 用 enhanced Preboot eXecution Environment (PXE) boot loader には、不特定の脆弱性が存在します。
|
| Possible impacts |
情報を取得される、情報を改ざんされる、およびサービス運用妨害 (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 |
Nov. 4, 2020, midnight |
| Registration Date |
June 28, 2021, 5:08 p.m. |
| Last Update |
June 28, 2021, 5:08 p.m. |
Affected System
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
Change Log
| No |
Changed Details |
Date of change |
| 1 |
[2021年06月28日]
掲載 |
June 28, 2021, 5:08 p.m. |