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basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

CVE-2021-33910 is a medium severity vulnerability affecting systemd versions prior to 246.15, 247.8, 248.5, and 249.1. The flaw exists in the basic/unit-name.c component of systemd, where a memory allocation with an excessive size value occurs due to the use of strdupa and alloca functions on a pathname that can be controlled by a local attacker. Specifically, these functions allocate memory on the stack based on the length of the pathname string. If an attacker can supply a very large pathname, this can lead to excessive stack memory allocation, causing a stack overflow or stack exhaustion that results in an operating system crash (denial of service). The vulnerability requires local access with low privileges (PR:L) and does not require user interaction (UI:N). The attack vector is local (AV:L), meaning the attacker must have some level of access to the system to exploit this issue. The vulnerability does not impact confidentiality or integrity but affects availability by causing system crashes. No known exploits are reported in the wild, and no official patches are linked in the provided data, though fixed versions are indicated. The underlying weakness is classified under CWE-770: Allocation of Resources Without Limits or Throttling, highlighting the risk of resource exhaustion due to unbounded memory allocation. This vulnerability is particularly relevant for Linux-based systems using systemd as their init system and service manager, which is common in many modern Linux distributions. Exploitation could be used by a local attacker to cause denial of service, potentially disrupting critical services or requiring system reboots to recover.

Detailed information about CVE-2021-33910: n/a in n/a affecting n/a n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2021-33910: n/a in n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2021-33910: n/a in n/a

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