PT-2025-4296 · Vyper · Vyper

Ritzdorf + 1 · Published 2025-01-14 · Updated 2025-01-18 · CVE-2025-21607

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Vyper versions 0.2.0 through 0.4.0

Description The Vyper Compiler has a vulnerability when using the precompiles EcRecover (0x1) and Identity (0x4), where the success flag of the call is not checked. This allows an attacker to provide a specific amount of gas to make these calls fail but let the overall execution continue, potentially leading to incorrect execution results. According to EVM's rules, after a failed precompile, the remaining code has only 1/64 of the pre-call-gas left, limiting the possible subsequent executions. No significantly impacted real-world contracts were found, but an advisory was made out of caution.

Recommendations For versions 0.2.0 through 0.4.0, update to a version where the fix is applied, as tracked in https://github.com/vyperlang/vyper/pull/4451. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-703

CWE-670

Related Identifiers

CVE-2025-21607

GHSA-VGF2-GVX8-XWC3

PYSEC-2025-33

Affected Products

Vyper

References · 12

• 🔥 https://github.com/vyperlang/vyper/security/advisories/GHSA-vgf2-gvx8-xwc3 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21607.json · Exploit
• https://osv.dev/vulnerability/GHSA-vgf2-gvx8-xwc3 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2025-33 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21607 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21607 · Vendor Advisory
• https://github.com/vyperlang/vyper · Note
• https://github.com/vyperlang/vyper/commit/7136eab0a254aa2ff7ddca41cc05f2ee1fa99caf · Note
• https://github.com/vyperlang/vyper/pull/4451 · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2025-33.yaml · Note
• https://t.me/cvedetector/15314 · Telegram Post
• https://twitter.com/CVEnew/status/1880761209982517317 · Twitter Post