GHSA-4h2g-xxvj-v3w5 · 深刻度： medium — FastNetMon Community Edition through 1.2.9 has out-of-bounds memory access because it incorrectly...
FastNetMon Community Edition through 1.2.9 has out-of-bounds memory access because it incorrectly parses BGP path attributes with the extended length flag set. In src/bgp_protocol.hpp, the parse_raw_bgp_attribute() function correctly identifies when extended_length_bit is set and sets length_of_length_field to 2, but then reads only a single byte for the attribute value length (attribute_value_length = value[2] at line 173). Per RFC 4271 Section 4.3, when the Extended Length bit is set, the Attribute Length field is two octets and the value should be read as a 16-bit big-endian integer from value[2] and value[3]. As a result, any attribute longer than 255 bytes has its length silently truncated to the low byte (e.g., 300 bytes = 0x012C is read as 0x2C = 44 bytes). The remaining 256 bytes are then misinterpreted as subsequent attributes, causing cascading parse failures and potential out-of-bounds memory access.
総合評価: CVE-2026-48685 は低リスク（33.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.29%、21 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.04% | 0.29% | +0.26% |
| 2 | 2026-05-27 | — | 0.04% | — |
EPSS の全履歴 （全 2 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | [email protected] |
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-4h2g-xxvj-v3w5 · 深刻度： medium — FastNetMon Community Edition through 1.2.9 has out-of-bounds memory access because it incorrectly...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-48685 unimportant priority: Debian including 1 source packages (fastnetmon), 4 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 3, open 1. | https://security-tracker.debian.org/tracker/CVE-2026-48685 |
ubuntu
|
medium | CVE-2026-48685 medium priority: Ubuntu including 1 source packages (fastnetmon), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, resolute, upstream): needs-triage 6, DNE 1. | https://ubuntu.com/security/CVE-2026-48685 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| pavel-odintsov | fastnetmon | <= 1.2.9 | cpe:2.3:a:pavel-odintsov:fastnetmon:*:*:*:*:community:*:*:* |