CVE-2024-38440 Memory corruption in n/a
An off-by-one error in Netatalk's login handling allows attackers to cause a heap buffer overflow and segmentation fault, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-38440?
CVE-2024-38440 is a high-severity memory corruption vulnerability in n/a, published on 16 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-193
Which versions are affected by CVE-2024-38440?
It affects 1 product.
Products include Netatalk Netatalk.
How do I fix CVE-2024-38440?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-38440 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-38440 exists.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2024-38440, GHSA-52mm-rqxx-gfq6, GHSA-mxx4-9fhm-r3w5, UBUNTU-CVE-2024-38440.