PT-2024-20451 · Vyper · Vyper

Zobront · Published 2024-02-02 · Updated 2024-02-12 · CVE-2024-24560

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Vyper (affected versions not specified)

Description The issue arises when calls to external contracts are made, and the input buffer overlaps with the return buffer. When checking RETURNDATASIZE for dynamic types, the size is compared only to the minimum allowed size for that type, and not to the returned value's length. As a result, malformed return data can cause the contract to mistake data from the input buffer for returndata. This can occur when the called contract returns invalid ABIv2 encoded data, allowing the calling contract to read different invalid data from the dirty buffer.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2024-24560

GHSA-GP3W-2V2M-P686

PYSEC-2024-148

Affected Products

Vyper

References · 11

• 🔥 https://github.com/vyperlang/vyper/security/advisories/GHSA-gp3w-2v2m-p686 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/24xxx/CVE-2024-24560.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2024-24560 · Security Note
• https://osv.dev/vulnerability/GHSA-gp3w-2v2m-p686 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-24560 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2024-148 · Vendor Advisory
• https://github.com/vyperlang/vyper · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2024-148.yaml · Note
• https://twitter.com/CVEnew/status/1753457673700610451 · Twitter Post
• https://t.me/cvenotify/69853 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1753503936214962638 · Twitter Post