漏洞信息
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Vulnerability Title
wicked: out-of-bounds read in the DHCPv4 option parser due to payload length taken from the IP total length
Vulnerability Description
An out-of-bounds read was found in the DHCPv4 packet capture code of wicked. ni_capture_inspect_udp_header() in src/capture.c reports the IP total length as the payload length instead of the length of the remaining UDP payload. Consequently, the DHCP option walker in the DHCPv4 client (wickedd-dhcp4) reads up to ihl + 8 bytes — at most 68 bytes — past the end of the 1500-byte packet receive buffer. An unauthenticated attacker on the same network who sends a crafted DHCP/UDP packet can make the client parse adjacent heap memory as DHCP options, so that heap contents such as allocator metadata or pointer values can be interpreted into lease fields. The over-read is bounded to 68 bytes; no memory write, no attacker control over the adjacent bytes and no remote exfiltration primitive has been demonstrated. This issue affects wicked up to and including version 0.6.80.
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Vulnerability Type
跨界内存读
Vulnerability Title
openSUSE wicked 缓冲区错误漏洞
Vulnerability Description
openSUSE wicked是openSUSE社区开源的一套网络配置管理工具集。 openSUSE wicked 0.6.80及之前版本存在安全漏洞,该漏洞源于DHCPv4数据包捕获代码中的越界读取,ni_capture_inspect_udp_header()函数将IP总长度误作为剩余UDP有效载荷长度,可能导致同一网络的未经身份验证的攻击者通过发送特制DHCP/UDP数据包,使客户端将相邻堆内存解析为DHCP选项,从而将堆内容(如分配器元数据或指针值)解释到租约字段中。
CVSS Information
N/A
Vulnerability Type
N/A