CVE-2026-57019MEDIUM· 6.5MITRENVD대응게시일: 2026. 07. 09.수정일: 2026. 07. 13.CNA: sirt@juniper.netAnalyzed

An Improper Validation of Specified Quantity in Input vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX

위협 신호 · CVSS · EPSS · KEV

정기 패치· 높은 악용 신호 없음

CVSS

6.5medium

이론적 심각도 점수

EPSS

0.2%상위 92.5%

30일 내 악용 확률 예측

KEV

미등재

실측 악용 기록 없음

권장 대응 기한60일 이내CISA SSVC 기준

계획된 패치 주기 내 조치(60일 이내)

외부 노출· KEV 미등재 · 자동화 어려움 · 부분 영향 · 외부 노출

CVSS 벡터 · 메트릭

악용 경로

공격 벡터인접

공격 복잡도낮음

필요 권한불필요

사용자 상호작용불필요

범위불변

영향

기밀성 영향없음

무결성 영향없음

가용성 영향높음

버전별 점수

CVSS 4.07.1HIGH· 악용성숙도 NOT_DEFINED

CVSS 3.16.5MEDIUM· 악용성 2.8· 영향도 3.6

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

약점 (CWE)

CWE-1284

상세 설명

An Improper Validation of Specified Quantity in Input vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS).

When a specific packet is received from device in the same broadcast domain, an affected system calculates the packet size incorrectly. This causes further packet processing to fail, which triggers an FPC major error, resulting in a FPC reset impacting traffic until the FPC has automatically recovered.

Affected scenarios are: MAP-T, or non-IP traffic encapsulated in IP (e.g. MPLS over GRE).

When this issue happens the following logs can be observed:

fpc<#> CMError: /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF (0x2205eb), scope: pfe, category: functional, severity: major, module: MQSS(0), type: LI: Unroll TAIL length overflow, oc_category: default
fpc<#> Performing action reset-fru for error /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF (0x2205eb) in module: MQSS(0) with scope: pfe category: functional level: major, oc_category: default

This issue affects Junos OS on MX Series:

all versions before 23.2R2-S6,
23.4 versions before 23.4R2-S7,
24.2 versions before 24.2R2-S4,
24.4 versions before 24.4R2-S4,
25.2 versions before 25.2R2.

AI 심층 분석

공격 시나리오 · 재현 가능한 PoC 페이로드 · 즉시 적용 가능한 차단 패치를 한 번에 받아 보세요. 보안 운영팀이 그대로 점검·티켓팅에 쓸 수 있는 형태로 정리해 드립니다.

영향받는 제품·버전

juniper junos< 23.2
other
juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper junos
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juniper mx10004
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juniper mx10008
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juniper mx2008
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juniper mx2010
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juniper mx2020
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juniper mx204
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juniper mx240
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juniper mx301
other
juniper mx304
other
juniper mx480
other
juniper mx960
other

영향받는 구성 (CPE) 53

juniper junos< 23.2cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s5:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s6:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2-s3:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r2-s2:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r2-s3:*:*:*:*:*:*
juniper junos 25.2cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*
juniper junos 25.2cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:*
juniper junos 25.2cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:*
juniper junos 25.2cpe:2.3:o:juniper:junos:25.2:r1-s2:*:*:*:*:*:*
juniper mx10004cpe:2.3:h:juniper:mx10004:-:*:*:*:*:*:*:*
juniper mx10008cpe:2.3:h:juniper:mx10008:-:*:*:*:*:*:*:*
juniper mx2008cpe:2.3:h:juniper:mx2008:-:*:*:*:*:*:*:*
juniper mx2010cpe:2.3:h:juniper:mx2010:-:*:*:*:*:*:*:*
juniper mx2020cpe:2.3:h:juniper:mx2020:-:*:*:*:*:*:*:*
juniper mx204cpe:2.3:h:juniper:mx204:-:*:*:*:*:*:*:*
juniper mx240cpe:2.3:h:juniper:mx240:-:*:*:*:*:*:*:*
juniper mx301cpe:2.3:h:juniper:mx301:-:*:*:*:*:*:*:*
juniper mx304cpe:2.3:h:juniper:mx304:-:*:*:*:*:*:*:*
juniper mx480cpe:2.3:h:juniper:mx480:-:*:*:*:*:*:*:*
juniper mx960cpe:2.3:h:juniper:mx960:-:*:*:*:*:*:*:*

참고 자료 1

https://supportportal.juniper.net/JSA110079
Vendor Advisory

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