zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold `(xor (shl 1, x), -1)` to `(rotl ~1, x)` if run with optimizations enabled. Here `~1` is generated as an unsigned 64 bits number (`2^64-1`). This number is zero-extended to 256 bits on EraVM target while it should have been sign-extended. Thus instead of producing `roti 2^256 - 1, x` the compiler produces `rotl 2^64 - 1, x`. Analysis has shown that no contracts were affected by the date of publishing this advisory. This issue has been addressed in version 1.5.3. Users are advised to upgrade and redeploy all contracts. There are no known workarounds for this vulnerability.
Metrics
Affected Vendors & Products
References
History
Tue, 03 Sep 2024 15:30:00 +0000
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Matter-labs zksolc
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CPEs | cpe:2.3:a:matter-labs:zksolc:*:*:*:*:*:*:*:* | |
Vendors & Products |
Matter-labs zksolc
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Thu, 29 Aug 2024 20:30:00 +0000
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Matter-labs
Matter-labs era-compiler-solidity |
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CPEs | cpe:2.3:a:matter-labs:era-compiler-solidity:*:*:*:*:*:*:*:* | |
Vendors & Products |
Matter-labs
Matter-labs era-compiler-solidity |
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Metrics |
ssvc
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Thu, 29 Aug 2024 17:00:00 +0000
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Description | zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold `(xor (shl 1, x), -1)` to `(rotl ~1, x)` if run with optimizations enabled. Here `~1` is generated as an unsigned 64 bits number (`2^64-1`). This number is zero-extended to 256 bits on EraVM target while it should have been sign-extended. Thus instead of producing `roti 2^256 - 1, x` the compiler produces `rotl 2^64 - 1, x`. Analysis has shown that no contracts were affected by the date of publishing this advisory. This issue has been addressed in version 1.5.3. Users are advised to upgrade and redeploy all contracts. There are no known workarounds for this vulnerability. | |
Title | `fold (xor (shl 1, x), -1) -> (rotl ~1, x)` misoptimization in zksolc | |
Weaknesses | CWE-682 | |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2024-08-29T16:55:53.281Z
Updated: 2024-08-29T17:16:47.076Z
Reserved: 2024-08-21T17:53:51.332Z
Link: CVE-2024-45056
Vulnrichment
Updated: 2024-08-29T17:16:42.609Z
NVD
Status : Analyzed
Published: 2024-08-29T17:15:09.173
Modified: 2024-09-03T15:14:54.877
Link: CVE-2024-45056
Redhat
No data.