194 lines
7.5 KiB
JSON
194 lines
7.5 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-6554",
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"assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896",
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"state": "PUBLISHED",
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"assignerShortName": "Tcpdump",
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"dateReserved": "2026-04-17T22:00:24.313Z",
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"datePublished": "2026-09-05T18:51:02.338Z",
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"dateUpdated": "2026-10-22T20:08:13.106Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"defaultStatus": "unaffected",
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"modules": [
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"BPF interpreter"
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],
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"product": "libpcap",
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"programFiles": [
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"bpf_filter.c"
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],
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"programRoutines": [
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{
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"name": "pcapint_filter_with_aux_data()"
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}
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],
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"repo": "https://github.com/the-tcpdump-group/libpcap/",
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"vendor": "The Tcpdump Group",
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"versions": [
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{
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"lessThan": "1.10.7",
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"status": "affected",
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"version": "0",
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"versionType": "semver"
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}
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"value": "An uncommon vulnerable configuration is an application that uses pcap_offline_filter() or bpf_filter() with an externally-supplied compiled filter program without validating the program first."
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},
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{
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"lang": "en",
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"value": "A common vulnerable configuration is an application that uses pcap_compile() to compile a filter expression, but the expression uses the 'protochain' primitive. Support for this primitive is conditional, but is enabled by default."
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "reporter",
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"value": "Kaixuan LI has discovered the crafted filter program attack vector"
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},
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{
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"lang": "en",
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"type": "finder",
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"value": "Denis Ovsienko has discovered the 'protochain' attack vector"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely."
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}
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],
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"exploits": [
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{
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"lang": "en",
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"value": "Functional exploits exist for both attack vectors."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7.5,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"version": "3.1"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-835",
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"description": "CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896",
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"shortName": "Tcpdump",
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"dateUpdated": "2026-10-22T17:28:27.086Z"
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},
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"references": [
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{
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"tags": [
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"patch"
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],
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"url": "https://github.com/the-tcpdump-group/libpcap/commit/ff3c83475ac303c6b681c52ad0b6e14795a8e0ce"
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}
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],
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"solutions": [
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{
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"lang": "en",
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"value": "Upgrade to libpcap 1.10.7."
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"title": "infinte loop in libpcap before 1.10.7",
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"workarounds": [
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{
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"lang": "en",
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"value": "Do not use filter programs that have been compiled outside of libpcap. Build libpcap without the 'protochain' primitive support."
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}
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],
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"x_generator": {
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"engine": "cvelib 1.8.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-09-08T15:14:56.820512Z",
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"id": "CVE-2026-6554",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-09-08T15:15:06.137Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "http://www.openwall.com/lists/oss-security/2026/10/22/3"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2026-10-22T20:08:13.106Z"
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}
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}
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]
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}
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} |