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4.2 KiB
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1 line
4.2 KiB
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{"schema_version":"1.9.0","id":"GHSA-pc3f-x583-g7j2","published":"2026-04-16T20:44:01Z","modified":"2026-09-10T03:51:02.523109450Z","aliases":["CVE-2026-35469","GO-2026-4958"],"summary":"SpdyStream: DOS on CRI","details":"The SPDY/3 frame parser in spdystream does not validate\nattacker-controlled counts and lengths before allocating memory. A\nremote peer that can send SPDY frames to a service using spdystream can\ncause the process to allocate gigabytes of memory with a small number of\nmalformed control frames, leading to an out-of-memory crash.\n \nThree allocation paths in the receive side are affected:\n1. **SETTINGS entry count** -- The SETTINGS frame reader reads a 32-bit\n`numSettings` from the payload and allocates a slice of that size\nwithout checking it against the declared frame length. An attacker\ncan set `numSettings` to a value far exceeding the actual payload,\ntriggering a large allocation before any setting data is read.\n \n2. **Header count** -- `parseHeaderValueBlock` reads a 32-bit\n`numHeaders` from the decompressed header block and allocates an\n`http.Header` map of that size with no upper bound.\n \n3. **Header field size** -- Individual header name and value lengths are\nread as 32-bit integers and used directly as allocation sizes with\nno validation.\n \nBecause SPDY header blocks are zlib-compressed, a small on-the-wire\npayload can decompress into attacker-controlled bytes that the parser\ninterprets as 32-bit counts and lengths. A single crafted frame is\nenough to exhaust process memory.\n## Impact\n Any program that accepts SPDY connections using spdystream -- directly\nor through a dependent library -- is affected. A remote peer that can\nsend SPDY frames to the service can crash the process with a single\ncrafted SPDY control frame, causing denial of service.\n## Affected versions\n `github.com/moby/spdystream` <= v0.5.0\n## Fix\n v0.5.1 addresses the receive-side allocation bugs and adds related\nhardening:\n \n**Core fixes:**\n \n- **SETTINGS entry-count validation** -- The SETTINGS frame reader now\nchecks that `numSettings` is consistent with the declared frame\nlength (`numSettings <= (length-4)/8`) before allocating.\n \n- **Header count limit** -- `parseHeaderValueBlock` enforces a maximum\nnumber of headers per frame (default: 1000).\n \n- **Header field size limit** -- Individual header name and value\nlengths are checked against a per-field size limit (default: 1 MiB)\nbefore allocation.\n \n- **Connection closure on protocol error** -- The connection read loop\nnow closes the underlying `net.Conn` when it encounters an\n`InvalidControlFrame` error, preventing further exploitation on the\nsame connection.\n \n**Additional hardening:**\n \n- **Write-side bounds checks** -- All frame write methods now verify\nthat payloads fit within the 24-bit length field, preventing the\nlibrary from producing invalid frames.\n \n**Configurable limits:**\n \n- Callers can adjust the defaults using `NewConnectionWithOptions` or\nthe lower-level `spdy.NewFramerWithOptions` with functional options:\n`WithMaxControlFramePayloadSize`, `WithMaxHeaderFieldSize`, and\n`WithMaxHeaderCount`.\n ","affected":[{"package":{"name":"github.com/moby/spdystream","ecosystem":"Go","purl":"pkg:golang/github.com/moby/spdystream"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.5.1"}]}],"database_specific":{"last_known_affected_version_range":"<= 0.5.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-pc3f-x583-g7j2/GHSA-pc3f-x583-g7j2.json"}}],"references":[{"type":"WEB","url":"https://github.com/moby/spdystream/security/advisories/GHSA-pc3f-x583-g7j2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35469"},{"type":"WEB","url":"https://github.com/moby/spdystream/commit/ef6121f62c730110bf5ae604a865a8613bfb787f"},{"type":"PACKAGE","url":"https://github.com/moby/spdystream"},{"type":"WEB","url":"https://github.com/moby/spdystream/releases/tag/v0.5.1"}],"database_specific":{"cwe_ids":["CWE-770"],"github_reviewed":true,"github_reviewed_at":"2026-04-16T20:44:01Z","nvd_published_at":"2026-04-16T22:16:37Z","severity":"HIGH"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]} |