CVE-2024-20294

Adjacent LLDP service crash via malformed frame fields

Published Feb 28, 2024 · Updated Aug 1, 2024

Improper LLDP frame handling in Cisco FXOS and NX-OS Software allows physically proximate attackers to crash the LLDP service. The LLDP parser mishandles specific fields in a crafted frame, and retrieving LLDP statistics through CLI or SNMP triggers repeated service crashes. LLDP must accept frames on an affected interface, the attacker must have direct Layer 2 connectivity, and an authenticated user must request statistics; the result is a stopped LLDP service or device reload.

CVSS severity6.6
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper LLDP frame handling in Cisco FXOS and NX-OS Software allows physically proximate attackers to crash the LLDP service. The LLDP parser mishandles specific fields in a crafted frame, and retrieving LLDP statistics through CLI or SNMP triggers repeated service crashes. LLDP must accept frames on an affected interface, the attacker must have direct Layer 2 connectivity, and an authenticated user must request statistics; the result is a stopped LLDP service or device reload.

The record

CVE
CVE-2024-20294
Published
Feb 28, 2024
Updated
Aug 1, 2024
Vendor
ClamAV
Product
Cisco Unified Computing System (Managed)
Classifications
CWE-805, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1(1e)
  2. Affected versionversion=3.1(1g)
  3. Affected versionversion=3.1(1h)
  4. Affected versionversion=3.1(1k)
  5. Affected versionversion=3.1(1l)
  6. Affected versionversion=3.1(2b)
  7. Affected versionversion=3.1(2c)
  8. Affected versionversion=3.1(2d)
  9. Affected versionversion=3.1(2e)
  10. Affected versionversion=3.1(2f)
  11. Affected versionversion=3.1(2g)
  12. Affected versionversion=3.1(2h)
  13. Affected versionversion=3.1(3a)
  14. Affected versionversion=3.1(3b)
  15. Affected versionversion=3.1(3c)
  16. Affected versionversion=3.1(3d)
  17. Affected versionversion=3.1(3e)
  18. Affected versionversion=3.1(3f)
  19. Affected versionversion=3.1(3h)
  20. Affected versionversion=3.1(3j)
  21. Affected versionversion=3.1(3k)
  22. Affected versionversion=3.1(3l)
  23. Affected versionversion=3.2(1d)
  24. Affected versionversion=3.2(2b)
  25. Affected versionversion=3.2(2c)
  26. Affected versionversion=3.2(2d)
  27. Affected versionversion=3.2(2e)
  28. Affected versionversion=3.2(2f)
  29. Affected versionversion=3.2(3a)
  30. Affected versionversion=3.2(3b)
  31. Affected versionversion=3.2(3d)
  32. Affected versionversion=3.2(3e)
  33. Affected versionversion=3.2(3g)
  34. Affected versionversion=3.2(3h)
  35. Affected versionversion=3.2(3i)
  36. Affected versionversion=3.2(3j)
  37. Affected versionversion=3.2(3k)
  38. Affected versionversion=3.2(3l)
  39. Affected versionversion=3.2(3n)
  40. Affected versionversion=3.2(3o)
  41. Affected versionversion=3.2(3p)
  42. Affected versionversion=4.0(1a)
  43. Affected versionversion=4.0(1b)
  44. Affected versionversion=4.0(1c)
  45. Affected versionversion=4.0(1d)
  46. Affected versionversion=4.0(2a)
  47. Affected versionversion=4.0(2b)
  48. Affected versionversion=4.0(2d)
  49. Affected versionversion=4.0(2e)
  50. Affected versionversion=4.0(4a)
  51. Affected versionversion=4.0(4b)
  52. Affected versionversion=4.0(4c)
  53. Affected versionversion=4.0(4d)
  54. Affected versionversion=4.0(4e)
  55. Affected versionversion=4.0(4f)
  56. Affected versionversion=4.0(4g)
  57. Affected versionversion=4.0(4h)
  58. Affected versionversion=4.0(4i)
  59. Affected versionversion=4.0(4k)
  60. Affected versionversion=4.0(4l)
  61. Affected versionversion=4.0(4m)
  62. Affected versionversion=4.0(4n)
  63. Affected versionversion=4.0(4o)
  64. Affected versionversion=4.1(1a)
  65. Affected versionversion=4.1(1b)
  66. Affected versionversion=4.1(1c)
  67. Affected versionversion=4.1(1d)
  68. Affected versionversion=4.1(1e)
  69. Affected versionversion=4.1(2a)
  70. Affected versionversion=4.1(2b)
  71. Affected versionversion=4.1(2c)
  72. Affected versionversion=4.1(3a)
  73. Affected versionversion=4.1(3b)
  74. Affected versionversion=4.1(3c)
  75. Affected versionversion=4.1(3d)
  76. Affected versionversion=4.1(3e)
  77. Affected versionversion=4.1(3f)
  78. Affected versionversion=4.1(3h)
  79. Affected versionversion=4.1(3i)
  80. Affected versionversion=4.1(3j)
  81. Affected versionversion=4.1(3k)
  82. Affected versionversion=4.1(3l)
  83. Affected versionversion=4.2(1c)
  84. Affected versionversion=4.2(1d)
  85. Affected versionversion=4.2(1f)
  86. Affected versionversion=4.2(1i)
  87. Affected versionversion=4.2(1k)
  88. Affected versionversion=4.2(1l)
  89. Affected versionversion=4.2(1m)
  90. Affected versionversion=4.2(1n)
  91. Affected versionversion=4.2(2a)
  92. Affected versionversion=4.2(2c)
  93. Affected versionversion=4.2(2d)
  94. Affected versionversion=4.2(2e)
  95. Affected versionversion=4.2(3b)
  96. Affected versionversion=4.2(3d)
  97. Affected versionversion=4.2(3e)
  98. Affected versionversion=4.2(3g)
  99. Affected versionversion=4.2(3h)
  100. Affected versionversion=4.2(3i)

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Computing System (Managed)version=3.1(1e); version=3.1(1g); version=3.1(1h); version=3.1(1k); version=3.1(1l); version=3.1(2b); version=3.1(2c); version=3.1(2d); version=3.1(2e); version=3.1(2f); version=3.1(2g); version=3.1(2h); version=3.1(3a); version=3.1(3b); version=3.1(3c); version=3.1(3d); version=3.1(3e); version=3.1(3f); version=3.1(3h); version=3.1(3j); version=3.1(3k); version=3.1(3l); version=3.2(1d); version=3.2(2b); version=3.2(2c); version=3.2(2d); version=3.2(2e); version=3.2(2f); version=3.2(3a); version=3.2(3b); version=3.2(3d); version=3.2(3e); version=3.2(3g); version=3.2(3h); version=3.2(3i); version=3.2(3j); version=3.2(3k); version=3.2(3l); version=3.2(3n); version=3.2(3o); version=3.2(3p); version=4.0(1a); version=4.0(1b); version=4.0(1c); version=4.0(1d); version=4.0(2a); version=4.0(2b); version=4.0(2d); version=4.0(2e); version=4.0(4a); version=4.0(4b); version=4.0(4c); version=4.0(4d); version=4.0(4e); version=4.0(4f); version=4.0(4g); version=4.0(4h); version=4.0(4i); version=4.0(4k); version=4.0(4l); version=4.0(4m); version=4.0(4n); version=4.0(4o); version=4.1(1a); version=4.1(1b); version=4.1(1c); version=4.1(1d); version=4.1(1e); version=4.1(2a); version=4.1(2b); version=4.1(2c); version=4.1(3a); version=4.1(3b); version=4.1(3c); version=4.1(3d); version=4.1(3e); version=4.1(3f); version=4.1(3h); version=4.1(3i); version=4.1(3j); version=4.1(3k); version=4.1(3l); version=4.2(1c); version=4.2(1d); version=4.2(1f); version=4.2(1i); version=4.2(1k); version=4.2(1l); version=4.2(1m); version=4.2(1n); version=4.2(2a); version=4.2(2c); version=4.2(2d); version=4.2(2e); version=4.2(3b); version=4.2(3d); version=4.2(3e); version=4.2(3g); version=4.2(3h); version=4.2(3i)
ClamAV · Cisco NX-OS Softwareversion=10.1(1); version=10.1(2); version=10.1(2t); version=10.2(1); version=10.2(1q); version=10.2(2); version=10.2(3); version=10.2(3t); version=10.2(3v); version=10.2(4); version=10.2(5); version=10.3(1); version=10.3(2); version=6.0(2)A3(1); version=6.0(2)A3(2); version=6.0(2)A3(4); version=6.0(2)A4(1); version=6.0(2)A4(2); version=6.0(2)A4(3); version=6.0(2)A4(4); version=6.0(2)A4(5); version=6.0(2)A4(6); version=6.0(2)A6(1); version=6.0(2)A6(1a); version=6.0(2)A6(2); version=6.0(2)A6(2a); version=6.0(2)A6(3); version=6.0(2)A6(3a); version=6.0(2)A6(4); version=6.0(2)A6(4a); version=6.0(2)A6(5); version=6.0(2)A6(5a); version=6.0(2)A6(5b); version=6.0(2)A6(6); version=6.0(2)A6(7); version=6.0(2)A6(8); version=6.0(2)A7(1); version=6.0(2)A7(1a); version=6.0(2)A7(2); version=6.0(2)A7(2a); version=6.0(2)A8(1); version=6.0(2)A8(10); version=6.0(2)A8(10a); version=6.0(2)A8(11); version=6.0(2)A8(11a); version=6.0(2)A8(11b); version=6.0(2)A8(2); version=6.0(2)A8(3); version=6.0(2)A8(4); version=6.0(2)A8(4a); version=6.0(2)A8(5); version=6.0(2)A8(6); version=6.0(2)A8(7); version=6.0(2)A8(7a); version=6.0(2)A8(7b); version=6.0(2)A8(8); version=6.0(2)A8(9); version=6.0(2)U2(1); version=6.0(2)U2(2); version=6.0(2)U2(3); version=6.0(2)U2(4); version=6.0(2)U2(5); version=6.0(2)U2(6); version=6.0(2)U3(1); version=6.0(2)U3(2); version=6.0(2)U3(3); version=6.0(2)U3(4); version=6.0(2)U3(5); version=6.0(2)U3(6); version=6.0(2)U3(7); version=6.0(2)U3(8); version=6.0(2)U3(9); version=6.0(2)U4(1); version=6.0(2)U4(2); version=6.0(2)U4(3); version=6.0(2)U4(4); version=6.0(2)U5(1); version=6.0(2)U5(2); version=6.0(2)U5(3); version=6.0(2)U5(4); version=6.0(2)U6(1); version=6.0(2)U6(10); version=6.0(2)U6(1a); version=6.0(2)U6(2); version=6.0(2)U6(2a); version=6.0(2)U6(3); version=6.0(2)U6(3a); version=6.0(2)U6(4); version=6.0(2)U6(4a); version=6.0(2)U6(5); version=6.0(2)U6(5a); version=6.0(2)U6(5b); version=6.0(2)U6(5c); version=6.0(2)U6(6); version=6.0(2)U6(7); version=6.0(2)U6(8); version=6.0(2)U6(9); version=6.2(1); version=6.2(10); version=6.2(11); version=6.2(11b); version=6.2(11c); version=6.2(11d); version=6.2(11e); version=6.2(12); version=6.2(13); version=6.2(13a); version=6.2(13b); version=6.2(14); version=6.2(15); version=6.2(16); version=6.2(17); version=6.2(18); version=6.2(19); version=6.2(2); version=6.2(20); version=6.2(20a); version=6.2(21); version=6.2(22); version=6.2(23); version=6.2(24); version=6.2(24a); version=6.2(25); version=6.2(27); version=6.2(29); version=6.2(2a); version=6.2(3); version=6.2(31); version=6.2(33); version=6.2(5); version=6.2(5a); version=6.2(5b); version=6.2(6); version=6.2(6a); version=6.2(6b); version=6.2(7); version=6.2(8); version=6.2(8a); version=6.2(8b); version=6.2(9); version=6.2(9a); version=6.2(9b); version=6.2(9c); version=7.0(3)F1(1); version=7.0(3)F2(1); version=7.0(3)F2(2); version=7.0(3)F3(1); version=7.0(3)F3(2); version=7.0(3)F3(3); version=7.0(3)F3(3a); version=7.0(3)F3(3c); version=7.0(3)F3(4); version=7.0(3)F3(5); version=7.0(3)I2(1); version=7.0(3)I2(1a); version=7.0(3)I2(2); version=7.0(3)I2(2a); version=7.0(3)I2(2b); version=7.0(3)I2(2c); version=7.0(3)I2(2d); version=7.0(3)I2(2e); version=7.0(3)I2(3); version=7.0(3)I2(4); version=7.0(3)I2(5); version=7.0(3)I3(1); version=7.0(3)I4(1); version=7.0(3)I4(2); version=7.0(3)I4(3); version=7.0(3)I4(4); version=7.0(3)I4(5); version=7.0(3)I4(6); version=7.0(3)I4(7); version=7.0(3)I4(8); version=7.0(3)I4(8a); version=7.0(3)I4(8b); version=7.0(3)I4(8z); version=7.0(3)I4(9); version=7.0(3)I5(1); version=7.0(3)I5(2); version=7.0(3)I6(1); version=7.0(3)I6(2); version=7.0(3)I7(1); version=7.0(3)I7(10); version=7.0(3)I7(2); version=7.0(3)I7(3); version=7.0(3)I7(4); version=7.0(3)I7(5); version=7.0(3)I7(5a); version=7.0(3)I7(6); version=7.0(3)I7(7); version=7.0(3)I7(8); version=7.0(3)I7(9); version=7.1(0)N1(1); version=7.1(0)N1(1a); version=7.1(0)N1(1b); version=7.1(1)N1(1); version=7.1(2)N1(1); version=7.1(3)N1(1); version=7.1(3)N1(2); version=7.1(4)N1(1); version=7.1(5)N1(1); version=7.1(5)N1(1b); version=7.2(0)D1(1); version=7.2(1)D1(1); version=7.2(2)D1(1); version=7.2(2)D1(2); version=7.3(0)D1(1); version=7.3(0)DX(1); version=7.3(0)DY(1); version=7.3(0)N1(1); version=7.3(10)N1(1); version=7.3(11)N1(1); version=7.3(12)N1(1); version=7.3(13)N1(1); version=7.3(1)D1(1); version=7.3(1)DY(1); version=7.3(1)N1(1); version=7.3(2)D1(1); version=7.3(2)D1(2); version=7.3(2)D1(3); version=7.3(2)D1(3a); version=7.3(2)N1(1); version=7.3(3)D1(1); version=7.3(3)N1(1); version=7.3(4)D1(1); version=7.3(4)N1(1); version=7.3(5)D1(1); version=7.3(5)N1(1); version=7.3(6)D1(1); version=7.3(6)N1(1); version=7.3(7)D1(1); version=7.3(7)N1(1); version=7.3(7)N1(1a); version=7.3(7)N1(1b); version=7.3(8)D1(1); version=7.3(8)N1(1); version=7.3(9)D1(1); version=7.3(9)N1(1); version=8.0(1); version=8.1(1); version=8.1(1a); version=8.1(1b); version=8.1(2); version=8.1(2a); version=8.2(1); version=8.2(10); version=8.2(2); version=8.2(3); version=8.2(4); version=8.2(5); version=8.2(6); version=8.2(7); version=8.2(7a); version=8.2(8); version=8.2(9); version=8.3(1); version=8.3(2); version=8.4(1); version=8.4(1a); version=8.4(2); version=8.4(2a); version=8.4(2b); version=8.4(2c); version=8.4(2d); version=8.4(2e); version=8.4(2f); version=8.4(3); version=8.4(4); version=8.4(4a); version=8.4(5); version=8.4(6); version=8.4(6a); version=8.4(7); version=8.5(1); version=9.2(1); version=9.2(1a); version=9.2(2); version=9.2(2t); version=9.2(2v); version=9.2(3); version=9.2(4); version=9.3(1); version=9.3(10); version=9.3(11); version=9.3(2); version=9.3(2a); version=9.3(3); version=9.3(4); version=9.3(5); version=9.3(6); version=9.3(7); version=9.3(7a); version=9.3(8); version=9.3(9)
ClamAV · Cisco Firepower eXtensible Operating System (FXOS)version=2.10.1.159; version=2.10.1.166; version=2.10.1.179; version=2.10.1.207; version=2.10.1.234; version=2.10.1.245; version=2.10.1.271; version=2.11.1.154; version=2.11.1.182; version=2.11.1.200; version=2.11.1.205; version=2.12.0.31; version=2.12.0.432; version=2.12.0.450; version=2.12.0.467; version=2.12.0.498; version=2.12.1.29; version=2.12.1.48; version=2.13.0.198; version=2.13.0.212; version=2.13.0.243; version=2.14.1.131; version=2.2.1.63; version=2.2.1.66; version=2.2.1.70; version=2.2.2.101; version=2.2.2.137; version=2.2.2.148; version=2.2.2.149; version=2.2.2.17; version=2.2.2.19; version=2.2.2.24; version=2.2.2.26; version=2.2.2.28; version=2.2.2.54; version=2.2.2.60; version=2.2.2.71; version=2.2.2.83; version=2.2.2.86; version=2.2.2.91; version=2.2.2.97; version=2.3.1.110; version=2.3.1.111; version=2.3.1.130; version=2.3.1.144; version=2.3.1.145; version=2.3.1.155; version=2.3.1.166; version=2.3.1.173; version=2.3.1.179; version=2.3.1.180; version=2.3.1.190; version=2.3.1.215; version=2.3.1.216; version=2.3.1.219; version=2.3.1.230; version=2.3.1.56; version=2.3.1.58; version=2.3.1.66; version=2.3.1.73; version=2.3.1.75; version=2.3.1.88; version=2.3.1.91; version=2.3.1.93; version=2.3.1.99; version=2.6.1.131; version=2.6.1.157; version=2.6.1.166; version=2.6.1.169; version=2.6.1.174; version=2.6.1.187; version=2.6.1.192; version=2.6.1.204; version=2.6.1.214; version=2.6.1.224; version=2.6.1.229; version=2.6.1.230; version=2.6.1.238; version=2.6.1.239; version=2.6.1.254; version=2.6.1.259; version=2.6.1.264; version=2.6.1.265; version=2.8.1.105; version=2.8.1.125; version=2.8.1.139; version=2.8.1.143; version=2.8.1.152; version=2.8.1.162; version=2.8.1.164; version=2.8.1.172; version=2.8.1.186; version=2.8.1.190; version=2.8.1.198; version=2.9.1.131; version=2.9.1.135; version=2.9.1.143; version=2.9.1.150; version=2.9.1.158
ClamAV · Cisco NX-OS System Software in ACI Modeversion=12.0(1m); version=12.0(1n); version=12.0(1o); version=12.0(1p); version=12.0(1q); version=12.0(1r); version=12.0(2f); version=12.0(2g); version=12.0(2h); version=12.0(2l); version=12.0(2m); version=12.0(2n); version=12.0(2o); version=12.1(1h); version=12.1(1i); version=12.1(2e); version=12.1(2g); version=12.1(2k); version=12.1(3g); version=12.1(3h); version=12.1(3j); version=12.1(4a); version=12.2(1n); version=12.2(1o); version=12.2(2e); version=12.2(2f); version=12.2(2i); version=12.2(2j); version=12.2(2k); version=12.2(2q); version=12.2(3j); version=12.2(3p); version=12.2(3r); version=12.2(3s); version=12.2(3t); version=12.2(4f); version=12.2(4p); version=12.2(4q); version=12.2(4r); version=12.3(1e); version=12.3(1f); version=12.3(1i); version=12.3(1l); version=12.3(1o); version=12.3(1p); version=13.0(1k); version=13.0(2h); version=13.0(2k); version=13.0(2n); version=13.1(1i); version=13.1(2m); version=13.1(2o); version=13.1(2p); version=13.1(2q); version=13.1(2s); version=13.1(2t); version=13.1(2u); version=13.1(2v); version=13.2(10e); version=13.2(10f); version=13.2(10g); version=13.2(1l); version=13.2(1m); version=13.2(2l); version=13.2(2o); version=13.2(3i); version=13.2(3n); version=13.2(3o); version=13.2(3r); version=13.2(3s); version=13.2(4d); version=13.2(4e); version=13.2(5d); version=13.2(5e); version=13.2(5f); version=13.2(6i); version=13.2(7f); version=13.2(7k); version=13.2(9b); version=13.2(9f); version=13.2(9h); version=14.0(1h); version=14.0(2c); version=14.0(3c); version=14.0(3d); version=14.1(1i); version=14.1(1j); version=14.1(1k); version=14.1(1l); version=14.1(2g); version=14.1(2m); version=14.1(2o); version=14.1(2s); version=14.1(2u); version=14.1(2w); version=14.1(2x); version=14.2(1i); version=14.2(1j); version=14.2(1l); version=14.2(2e); version=14.2(2f); version=14.2(2g); version=14.2(3j); version=14.2(3l); version=14.2(3n); version=14.2(3q); version=14.2(4i); version=14.2(4k); version=14.2(4o); version=14.2(4p); version=14.2(5k); version=14.2(5l); version=14.2(5n); version=14.2(6d); version=14.2(6g); version=14.2(6h); version=14.2(6l); version=14.2(6o); version=14.2(7f); version=14.2(7l); version=14.2(7q); version=14.2(7r); version=14.2(7s); version=14.2(7t); version=14.2(7u); version=14.2(7v); version=14.2(7w); version=15.0(1k); version=15.0(1l); version=15.0(2e); version=15.0(2h); version=15.1(1h); version=15.1(2e); version=15.1(3e); version=15.1(4c); version=15.2(1g); version=15.2(2e); version=15.2(2f); version=15.2(2g); version=15.2(2h); version=15.2(3e); version=15.2(3f); version=15.2(3g); version=15.2(4d); version=15.2(4e); version=15.2(4f); version=15.2(5c); version=15.2(5d); version=15.2(5e); version=15.2(6e); version=15.2(6g); version=15.2(7f); version=15.2(7g); version=15.2(8d); version=15.2(8e); version=15.2(8f); version=15.2(8g); version=15.3(1d); version=16.0(1g); version=16.0(1j); version=16.0(2h); version=16.0(2j); version=16.0(3d); version=16.0(3e)

Published CVSS scores

6.6Cisco Systems, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-805Buffer Access with Incorrect Length Value
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

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