Lucene search

K
cvelistGitHub_MCVELIST:CVE-2023-40015
HistorySep 04, 2023 - 5:39 p.m.

CVE-2023-40015 Vyper: reversed order of side effects for some operations

2023-09-0417:39:12
CWE-670
GitHub_M
www.cve.org
2
vyper
pythonic
smart contract
language
cve-2023-40015
side effects
reversed order

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.001

Percentile

30.2%

Vyper is a Pythonic Smart Contract Language. For the following (probably non-exhaustive) list of expressions, the compiler evaluates the arguments from right to left instead of left to right. unsafe_add, unsafe_sub, unsafe_mul, unsafe_div, pow_mod256, |, &, ^ (bitwise operators), bitwise_or (deprecated), bitwise_and (deprecated), bitwise_xor (deprecated), raw_call, <, >, <=, >=, ==, !=, in, not in (when lhs and rhs are enums). This behaviour becomes a problem when the evaluation of one of the arguments produces side effects that other arguments depend on. The following expressions can produce side-effect: state modifying external call , state modifying internal call, raw_call, pop() when used on a Dynamic Array stored in the storage, create_minimal_proxy_to, create_copy_of, create_from_blueprint. This issue has not yet been patched. Users are advised to make sure that the arguments of the expression do not produce side effects or, if one does, that no other argument is dependent on those side effects.

CNA Affected

[
  {
    "vendor": "vyperlang",
    "product": "vyper",
    "versions": [
      {
        "version": "<= 0.3.9",
        "status": "affected"
      }
    ]
  }
]

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.001

Percentile

30.2%

Related for CVELIST:CVE-2023-40015