Vulnerability Description
Netatalk before 3.2.1 has an off-by-one error, and resultant heap-based buffer overflow and segmentation violation, because of incorrectly using FPLoginExt in BN_bin2bn in etc/uams/uams_dhx_pam.c. The original issue 1097 report stated: 'The latest version of Netatalk (v3.2.0) contains a security vulnerability. This vulnerability arises due to a lack of validation for the length field after parsing user-provided data, leading to an out-of-bounds heap write of one byte (\0). Under specific configurations, this can result in reading metadata of the next heap block, potentially causing a Denial of Service (DoS) under certain heap layouts or with ASAN enabled. ... The vulnerability is located in the FPLoginExt operation of Netatalk, in the BN_bin2bn function found in /etc/uams/uams_dhx_pam.c ... if (!(bn = BN_bin2bn((unsigned char *)ibuf, KEYSIZE, NULL))) ... threads ... [#0] Id 1, Name: "afpd", stopped 0x7ffff4304e58 in ?? (), reason: SIGSEGV ... [#0] 0x7ffff4304e58 mov BYTE PTR [r14+0x8], 0x0 ... mov rdx, QWORD PTR [rsp+0x18] ... afp_login_ext(obj=<optimized out>, ibuf=0x62d000010424 "", ibuflen=0xffffffffffff0015, rbuf=<optimized out>, rbuflen=<optimized out>) ... afp_over_dsi(obj=0x5555556154c0 <obj>).' 2.4.1 and 3.1.19 are also fixed versions.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netatalk | Netatalk | >= 2.0.0, < 2.4.1 |
Related Weaknesses (CWE)
References
- https://github.com/Netatalk/netatalk/blob/90d91a9ac9a7d6132ab7620d31c8c234009492Product
- https://github.com/Netatalk/netatalk/issues/1097Not Applicable
- https://github.com/Netatalk/netatalk/security/advisories/GHSA-mxx4-9fhm-r3w5ExploitVendor Advisory
- https://netatalk.io/security/CVE-2024-38440Vendor Advisory
- https://github.com/Netatalk/netatalk/blob/90d91a9ac9a7d6132ab7620d31c8c234009492Product
- https://github.com/Netatalk/netatalk/issues/1097Not Applicable
- https://github.com/Netatalk/netatalk/security/advisories/GHSA-mxx4-9fhm-r3w5ExploitVendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/11/msg00026.html
- https://netatalk.io/security/CVE-2024-38440Vendor Advisory
FAQ
What is CVE-2024-38440?
CVE-2024-38440 is a vulnerability with a CVSS score of 7.5 (HIGH). Netatalk before 3.2.1 has an off-by-one error, and resultant heap-based buffer overflow and segmentation violation, because of incorrectly using FPLoginExt in BN_bin2bn in etc/uams/uams_dhx_pam.c. The...
How severe is CVE-2024-38440?
CVE-2024-38440 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-38440?
Check the references section above for vendor advisories and patch information. Affected products include: Netatalk Netatalk.