CVE-2021-26706
| Summary |
An issue was discovered in lib_mem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00. The following memory allocation functions do not check for integer overflow when allocating a pool whose size exceeds the address space: Mem_PoolCreate, Mem_DynPoolCreate, and Mem_DynPoolCreateHW. Because these functions use multiplication to calculate the pool sizes, the operation may cause an integer overflow if the arguments are large enough. The resulting memory pool will be smaller than expected and may be exploited by an attacker.
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| Publication Date |
Jan. 24, 2022, 10:15 a.m. |
| Registration Date |
Jan. 24, 2022, 4 p.m. |
| Last Update |
Nov. 21, 2024, 2:56 p.m. |
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CVSS3.1 : CRITICAL
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| スコア |
9.8
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| Vector |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
不要 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
高 |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
高 |
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CVSS2.0 : HIGH
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| Score |
7.5
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| Vector |
AV:N/AC:L/Au:N/C:P/I:P/A:P |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃前の認証要否(Au) |
不要 |
| 機密性への影響(C) |
低 |
| 完全性への影響(I) |
低 |
| 可用性への影響(A) |
低 |
| Get all privileges. |
いいえ
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| Get user privileges |
いいえ
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| Get other privileges |
いいえ
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| User operation required |
いいえ
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Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:micrium:uc\/lib:1.38.00:*:*:*:*:*:*:* |
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| cpe:2.3:a:micrium:uc\/lib:1.38.01:*:*:*:*:*:*:* |
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| cpe:2.3:a:micrium:uc\/lib:1.38.02:*:*:*:*:*:*:* |
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| cpe:2.3:a:micrium:uc\/lib:1.38.03:*:*:*:*:*:*:* |
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| cpe:2.3:a:micrium:uc\/lib:1.38.04:*:*:*:*:*:*:* |
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| cpe:2.3:a:micrium:uc\/lib:1.38.05:*:*:*:*:*:*:* |
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| cpe:2.3:a:micrium:uc\/lib:1.39.00:*:*:*:*:*:*:* |
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Related information, measures and tools
Common Vulnerabilities List