CVE-2024-24806
This behavior can be exploited to create addresses like `0x00007f000001`, which are considered valid by `getaddrinfo` and could allow an attacker to craft payloads that resolve to unintended IP addresses, bypassing developer checks.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.00%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
libuv is a multi-platform support library with a focus on asynchronous I/O. The `uv_getaddrinfo` function in `src/unix/getaddrinfo.c` (and its windows counterpart `src/win/getaddrinfo.c`), truncates hostnames to 256 characters before calling `getaddrinfo`. This behavior can be exploited to create addresses like `0x00007f000001`, which are considered valid by `getaddrinfo` and could allow an attacker to craft payloads that resolve to unintended IP addresses, bypassing developer checks. The vulnerability arises due to how the `hostname_ascii` variable (with a length of 256 bytes) is handled in `uv_getaddrinfo` and subsequently in `uv__idna_toascii`. When the hostname exceeds 256 characters, it gets truncated without a terminating null byte. As a result attackers may be able to access internal APIs or for websites (similar to MySpace) that allows users to have `username.example.com` pages. Internal services that crawl or cache these user pages can be exposed to SSRF attacks if a malicious user chooses a long vulnerable username. This issue has been addressed in release version 1.48.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 2.00% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- libuv/libuv
- Source
- security-advisories@github.com
References
- http://www.openwall.com/lists/oss-security/2024/02/08/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/02/11/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/03/11/1
- https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629Patch
- https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70Patch
- https://github.com/libuv/libuv/commit/c858a147643de38a09dd4164758ae5b685f2b488Patch
- https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39Patch
- https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6Exploit, Vendor Advisory
- https://gitlab.kitware.com/cmake/cmake/-/issues/26112
- https://lists.debian.org/debian-lts-announce/2024/03/msg00005.html
- https://security.netapp.com/advisory/ntap-20240605-0008/
- http://www.openwall.com/lists/oss-security/2024/02/08/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/02/11/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/03/11/1
- https://github.com/libuv/libuv/commit/0f2d7e784a256b54b2385043438848047bc2a629Patch
- https://github.com/libuv/libuv/commit/3530bcc30350d4a6ccf35d2f7b33e23292b9de70Patch
- https://github.com/libuv/libuv/commit/c858a147643de38a09dd4164758ae5b685f2b488Patch
- https://github.com/libuv/libuv/commit/e0327e1d508b8207c9150b6e582f0adf26213c39Patch
- https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6Exploit, Vendor Advisory
- https://gitlab.kitware.com/cmake/cmake/-/issues/26112
- https://lists.debian.org/debian-lts-announce/2024/03/msg00005.html
- https://security.netapp.com/advisory/ntap-20240605-0008/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.