CVE-2024-26851 (GCVE-0-2024-26851)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:17 – Updated: 2025-05-04 08:57
VLAI?
Title
netfilter: nf_conntrack_h323: Add protection for bmp length out of range
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: Add protection for bmp length out of range UBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts that are out of bounds for their data type. vmlinux get_bitmap(b=75) + 712 <net/netfilter/nf_conntrack_h323_asn1.c:0> vmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956 <net/netfilter/nf_conntrack_h323_asn1.c:592> vmlinux decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216 <net/netfilter/nf_conntrack_h323_asn1.c:814> vmlinux decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812 <net/netfilter/nf_conntrack_h323_asn1.c:576> vmlinux decode_choice(base=0xFFFFFFD008037280, level=0) + 1216 <net/netfilter/nf_conntrack_h323_asn1.c:814> vmlinux DecodeRasMessage() + 304 <net/netfilter/nf_conntrack_h323_asn1.c:833> vmlinux ras_help() + 684 <net/netfilter/nf_conntrack_h323_main.c:1728> vmlinux nf_confirm() + 188 <net/netfilter/nf_conntrack_proto.c:137> Due to abnormal data in skb->data, the extension bitmap length exceeds 32 when decoding ras message then uses the length to make a shift operation. It will change into negative after several loop. UBSAN load could detect a negative shift as an undefined behaviour and reports exception. So we add the protection to avoid the length exceeding 32. Or else it will return out of range error and stop decoding.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 98db42191329c679f4ca52bec0b319689e1ad8cb (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 4bafcc43baf7bcf93566394dbd15726b5b456b7a (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < ccd1108b16ab572d9bf635586b0925635dbd6bbc (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < b3c0f553820516ad4b62a9390ecd28d6f73a7b13 (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 39001e3c42000e7c2038717af0d33c32319ad591 (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 014a807f1cc9c9d5173c1cd935835553b00d211c (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 80ee5054435a11c87c9a4f30f1ff750080c96416 (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 767146637efc528b5e3d31297df115e85a2fd362 (git)
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    Linux Linux Affected: 2.6.17
Unaffected: 0 , < 2.6.17 (semver)
Unaffected: 4.19.310 , ≤ 4.19.* (semver)
Unaffected: 5.4.272 , ≤ 5.4.* (semver)
Unaffected: 5.10.213 , ≤ 5.10.* (semver)
Unaffected: 5.15.152 , ≤ 5.15.* (semver)
Unaffected: 6.1.82 , ≤ 6.1.* (semver)
Unaffected: 6.6.22 , ≤ 6.6.* (semver)
Unaffected: 6.7.10 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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\"*\"}], \"programFiles\": [\"net/netfilter/nf_conntrack_h323_asn1.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\"}, {\"url\": \"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\"}, {\"url\": \"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\"}, {\"url\": \"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\"}, {\"url\": \"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\"}, {\"url\": \"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\"}, {\"url\": \"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\"}, {\"url\": \"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\\n\\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\\nthat are out of bounds for their data type.\\n\\nvmlinux   get_bitmap(b=75) + 712\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   DecodeRasMessage() + 304\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\\nvmlinux   ras_help() + 684\\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\\nvmlinux   nf_confirm() + 188\\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\\n\\nDue to abnormal data in skb-\u003edata, the extension bitmap length\\nexceeds 32 when decoding ras message then uses the length to make\\na shift operation. It will change into negative after several loop.\\nUBSAN load could detect a negative shift as an undefined behaviour\\nand reports exception.\\nSo we add the protection to avoid the length exceeding 32. Or else\\nit will return out of range error and stop decoding.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.310\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.272\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.213\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.152\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.82\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.22\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.10\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"2.6.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:57:57.098Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26851\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:57:57.098Z\", \"dateReserved\": \"2024-02-19T14:20:24.183Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:17:15.298Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.