| 标题 | GoBGP 4.3.0 Improper Input Validation |
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| 描述 | Discovery / credits: Siru Ren, School of Cybersecurity, Northwestern Polytechnical University; Xiangjun Sun, School of Cybersecurity, Northwestern Polytechnical University; Jiahao Lei, School of Cybersecurity, Northwestern Polytechnical University; Zhouyan Deng, School of Cybersecurity, Northwestern Polytechnical University; Jiajia Liu, School of Cybersecurity, Northwestern Polytechnical University.
A vulnerability was found in GoBGP 4.3.0 in the AIGP attribute parser. It has been classified as improper input validation. The issue is located in pkg/packet/bgp/bgp.go in the function PathAttributeAigp.DecodeFromBytes().
When a TLV's declared length exceeds the remaining buffer, the parser uses break to silently stop processing instead of returning an explicit error. In the AIGP_TLV_IGP_METRIC branch, a too-short TLV is also silently ignored in the same way.
This behavior may cause malformed TLVs and subsequent TLVs to be silently discarded, while only a generic length error is reported later. A crafted BGP UPDATE containing an AIGP attribute may exploit this logic to manipulate route metric handling by causing important metric TLVs to be dropped.
Affected file: pkg/packet/bgp/bgp.go
Affected function: PathAttributeAigp.DecodeFromBytes()
Impact: Route metric manipulation via silent data truncation. |
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| 来源 | ⚠️ https://github.com/osrg/gobgp/commit/51ad1ada06cb41ce47b7066799981816f50b7ced |
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| 用户 | rensiru (UID 96440) |
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| 提交 | 2026-04-18 10時30分 (6 月前) |
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| 管理 | 2026-05-03 18時16分 (15 days later) |
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| 状态 | 已接受 |
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| VulDB条目 | 360910 [osrg GoBGP 直到 4.3.0 AIGP Attribute Parser pkg/packet/bgp/bgp.go PathAttributeAigp.DecodeFromBytes 内存损坏] |
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| 积分 | 20 |
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