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Alp Al00b FirmwareOperating system · Huawei

CVE-2019-5302

MEDIUM · 5.3 CVSS v3.1 Published 2020-04-27
Fix available
A fix is available. Upgrade to 9.1.0.300 / 9.1.0.302 or later.
See remediation →
58/100
Remediation priority · Elevated
No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
There are two denial of service vulnerabilities on some Huawei smartphones. An attacker may send specially crafted TD-SCDMA messages from a rogue base station to the affected devices. Due to insufficient input validation of two values when parsing the messages, successful exploit may cause device abnormal. This is 1 out of 2 vulnerabilities. Different than CVE-2020-5303. Affected products are: ALP-AL00B: earlier than 9.1.0.333(C00E333R2P1T8) ALP-L09: earlier than 9.1.0.300(C432E4R1P9T8) ALP-L29: earlier than 9.1.0.315(C636E5R1P13T8) BLA-L29C: earlier than 9.1.0.321(C636E4R1P14T8), earlier than 9.1.0.330(C432E6R1P12T8), earlier than 9.1.0.302(C635E4R1P13T8) Berkeley-AL20: earlier than 9.1.0.333(C00E333R2P1T8) Berkeley-L09: earlier than 9.1.0.350(C10E3R1P14T8), earlier than 9.1.0.351(C432E5R1P13T8), earlier than 9.1.0.350(C636E4R1P13T8) Charlotte-L09C: earlier than 9.1.0.311(C185E4R1P11T8), earlier than 9.1.0.345(C432E8R1P11T8) Charlotte-L29C: earlier than 9.1.0.325(C185E4R1P11T8), earlier than 9.1.0.335(C636E3R1P13T8), earlier than 9.1.0.345(C432E8R1P11T8), earlier than 9.1.0.336(C605E3R1P12T8) Columbia-AL10B: earlier than 9.1.0.333(C00E333R1P1T8) Columbia-L29D: earlier than 9.1.0.350(C461E3R1P11T8), earlier than 9.1.0.350(C185E3R1P12T8), earlier than 9.1.0.350(C10E5R1P14T8), earlier than 9.1.0.351(C432E5R1P13T8) Cornell-AL00A: earlier than 9.1.0.333(C00E333R1P1T8) Cornell-L29A: earlier than 9.1.0.328(C185E1R1P9T8), earlier than 9.1.0.328(C432E1R1P9T8), earlier than 9.1.0.330(C461E1R1P9T8), earlier than 9.1.0.328(C636E2R1P12T8) Emily-L09C: earlier than 9.1.0.336(C605E4R1P12T8), earlier than 9.1.0.311(C185E2R1P12T8), earlier than 9.1.0.345(C432E10R1P12T8) Emily-L29C: earlier than 9.1.0.311(C605E2R1P12T8), earlier than 9.1.0.311(C636E7R1P13T8), earlier than 9.1.0.311(C432E7R1P11T8) Ever-L29B: earlier than 9.1.0.311(C185E3R3P1), earlier than 9.1.0.310(C636E3R2P1), earlier than 9.1.0.310(C432E3R1P12) HUAWEI Mate 20: earlier than 9.1.0.131(C00E131R3P1) HUAWEI Mate 20 Pro: earlier than 9.1.0.310(C185E10R2P1) HUAWEI Mate 20 RS: earlier than 9.1.0.135(C786E133R3P1) HUAWEI Mate 20 X: earlier than 9.1.0.135(C00E133R2P1) HUAWEI P20: earlier than 9.1.0.333(C00E333R1P1T8) HUAWEI P20 Pro: earlier than 9.1.0.333(C00E333R1P1T8) HUAWEI P30: earlier than 9.1.0.193 HUAWEI P30 Pro: earlier than 9.1.0.186(C00E180R2P1) HUAWEI Y9 2019: earlier than 9.1.0.220(C605E3R1P1T8) HUAWEI nova lite 3: earlier than 9.1.0.305(C635E8R2P2) Honor 10 Lite: earlier than 9.1.0.283(C605E8R2P2) Honor 8X: earlier than 9.1.0.221(C461E2R1P1T8) Honor View 20: earlier than 9.1.0.238(C432E1R3P1) Jackman-L22: earlier than 9.1.0.247(C636E2R4P1T8) Paris-L21B: earlier than 9.1.0.331(C432E1R1P2T8) Paris-L21MEB: earlier than 9.1.0.331(C185E4R1P3T8) Paris-L29B: earlier than 9.1.0.331(C636E1R1P3T8) Sydney-AL00: earlier than 9.1.0.212(C00E62R1P7T8) Sydney-L21: earlier than 9.1.0.215(C432E1R1P1T8), earlier than 9.1.0.213(C185E1R1P1T8) Sydney-L21BR: earlier than 9.1.0.213(C185E1R1P2T8) Sydney-L22: earlier than 9.1.0.258(C636E1R1P1T8) Sydney-L22BR: earlier than 9.1.0.258(C636E1R1P1T8) SydneyM-AL00: earlier than 9.1.0.228(C00E78R1P7T8) SydneyM-L01: earlier than 9.1.0.215(C782E2R1P1T8), earlier than 9.1.0.213(C185E1R1P1T8), earlier than 9.1.0.270(C432E3R1P1T8) SydneyM-L03: earlier than 9.1.0.217(C605E1R1P1T8) SydneyM-L21: earlier than 9.1.0.221(C461E1R1P1T8), earlier than 9.1.0.215(C432E4R1P1T8) SydneyM-L22: earlier than 9.1.0.259(C185E1R1P2T8), earlier than 9.1.0.220(C635E1R1P2T8), earlier than 9.1.0.216(C569E1R1P1T8) SydneyM-L23: earlier than 9.1.0.226(C605E2R1P1T8) Yale-L21A: earlier than 9.1.0.154(C432E2R3P2), earlier than 9.1.0.154(C461E2R2P1), earlier than 9.1.0.154(C636E2R2P1) Honor 20: earlier than 9.1.0.152(C00E150R5P1) Honor Magic2: earlier than 10.0.0.187 Honor V20: earlier than 9.1.0.234(C00E234R4P3)

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This vulnerability exists in the TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) message parsing functionality of affected Huawei smartphones. An attacker operating a rogue base station can send specially crafted TD-SCDMA messages containing malicious values. Due to insufficient input validation of two specific values during message parsing, the malformed messages cause the device to become abnormal, resulting in denial of service.

MitigationApply the vendor-supplied firmware updates to the specific versions listed in the Huawei security advisory. Users cannot mitigate this vulnerability through configuration changes as the attack originates from a malicious base station.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Alp Al00b FirmwareOperating system
Affected:< 9.1.0.333\(c00e333r2p1t8\)
Alp L09 FirmwareOperating system
Affected:< 9.1.0.300\(c432e4r1p9t8\)
Alp L29 FirmwareOperating system
Affected:< 9.1.0.315\(c636e5r1p13t8\)
Bla L29c FirmwareOperating system
Affected:< 9.1.0.321\(c636e4r1p14t8\)< 9.1.0.330\(c432e6r1p12t8\)< 9.1.0.302\(c635e4r1p13t8\)
Berkeley Al20 FirmwareOperating system
Affected:< 9.1.0.333\(c00e333r2p1t8\)
Berkeley L09 FirmwareOperating system
Affected:< 9.1.0.350\(c10e3r1p14t8\)< 9.1.0.351\(c432e5r1p13t8\)< 9.1.0.350\(c636e4r1p13t8\)
Charlotte L09c FirmwareOperating system
Affected:< 9.1.0.311\(c185e4r1p11t8\)< 9.1.0.345\(c432e8r1p11t8\)
Charlotte L29c FirmwareOperating system
Affected:< 9.1.0.325\(c185e4r1p11t8\)< 9.1.0.335\(c636e3r1p13t8\)< 9.1.0.345\(c432e8r1p11t8\)< 9.1.0.336\(c605e3r1p12t8\)

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify your Huawei smartphone model
    Go to Settings > About Phone > Model Number (or look at the physical device backplate) and note the exact model name (e.g., Alp-Al00b, Alp-L09, Bla-L29c, Berkeley-Al20, Charlotte-L09c)
    Affected if The model matches one of the affected models: Alp, Bla, Berkeley, or Charlotte series
  2. Check your current firmware build number
    Go to Settings > About Phone > Build Number, or dial *#*#2846579#*#* to access the engineering menu, then navigate to Version Information > SW Version to see the full firmware version string
    Affected if You cannot determine the version from the About Phone screen alone
  3. Extract the full firmware version string
    In Settings > About Phone, note the complete version which typically includes a build number like c00e333r2p1t8, c432e4r1p9t8, c636e5r1p13t8, etc.
    Affected if The version string is visible and contains the build identifier in parentheses
  4. Compare your firmware version against affected ranges for your specific model
    Match your model and build number to the affected versions list: Alp Al00b: < 9.1.0.333(c00e333r2p1t8); Alp L09: < 9.1.0.300(c432e4r1p9t8); Alp L29: < 9.1.0.315(c636e5r1p13t8); Bla L29c: < 9.1.0.321(c636e4r1p14t8) or < 9.1.0.330(c432e6r1p12t8) or < 9.1.0.302(c635e4r1p13t8); Berkeley Al20: < 9.1.0.333(c00e333r2p1t8); Berkeley L09: < 9.1.0.350(c10e3r1p14t8) or < 9.1.0.351(c432e5r1p13t8) or < 9.1.0.350(c636e4r1p13t8); Charlotte L09c: < 9.1.0.311(c185e4r1p11t8) or < 9.1.0.345(c432e8r1p11t8); Charlotte L29c: < 9.1.0.325(c185e4r1p11t8) or < 9.1.0.335(c636e3r1p13t8) or < 9.1.0.345(c432e8r1p11t8) or <
    Affected if Your firmware version is lower than the specified version for any of the build identifiers listed for your model
  5. Confirm TD-SCDMA network capability (context only)
    This check is informational: the vulnerability affects TD-SCDMA parsing in the baseband modem; if your device supports TD-SCDMA networks (primarily China Mobile networks), it contains the affected component - this is not a configurable setting
    Affected if This is not a detection criterion as the vulnerability exists in the baseband processor regardless of network availability

You are affected if you own a Huawei smartphone from the Alp, Bla, Berkeley, or Charlotte series and your current firmware build number is lower than the version thresholds listed for your specific model and build identifier.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 9.1.0.300 / 9.1.0.302 / 9.1.0.311 or later
Fixed in 9.1.0.3009.1.0.3029.1.0.311
Interim mitigation

Apply the vendor-supplied firmware updates to the specific versions listed in the Huawei security advisory. Users cannot mitigate this vulnerability through configuration changes as the attack originates from a malicious base station.

Fix this in Alp Al00b Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,120
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-5302 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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