发布时间 :2001-09-20 00:00:00
修订时间 :2017-10-09 21:29:50

[原文]NetBSD 1.5 and earlier and FreeBSD 4.3 and earlier allows a remote attacker to cause a denial of service by sending a large number of IP fragments to the machine, exhausting the mbuf pool.


        NetBSD 1.5及其早期版本和FreeBSD 4.3及其早期版本存在漏洞。远程攻击者可以通过向机器发送大量的IP碎片导致服务拒绝,该漏洞耗尽mbuf池。

- CVSS (基础分值)

CVSS分值: 5 [中等(MEDIUM)]
机密性影响: [--]
完整性影响: [--]
可用性影响: [--]
攻击复杂度: [--]
攻击向量: [--]
身份认证: [--]

- CPE (受影响的平台与产品)

cpe:/o:freebsd:freebsd:4.3FreeBSD 4.3
cpe:/o:netbsd:netbsd:1.5NetBSD 1.5

- OVAL (用于检测的技术细节)


- 官方数据库链接
(官方数据源) MITRE
(官方数据源) NVD
(官方数据源) CNNVD

- 其它链接及资源
(UNKNOWN)  XF  bsd-ip-fragments-dos(6636)

- 漏洞信息

中危 未知
2001-09-20 00:00:00 2005-05-02 00:00:00
        NetBSD 1.5及其早期版本和FreeBSD 4.3及其早期版本存在漏洞。远程攻击者可以通过向机器发送大量的IP碎片导致服务拒绝,该漏洞耗尽mbuf池。

- 公告与补丁


- 漏洞信息

Multiple BSD IP Fragment mbuf Pool DoS
Remote / Network Access Denial of Service
Loss of Availability

- 漏洞描述

Multiple BSD operating systems contain a flaw that may allow a remote denial of service. The issue is triggered when a malicious attacker transmits a large number of fragmented IPv4 datagrams to fill the mbuf pool on a target system, which will prevent network traffic processing. This will result in a loss of availability for the platform.

- 时间线

2001-05-29 Unknow
Unknow Unknow

- 解决方案

Upgrade FreeBSD to 4.3-STABLE or to the RELENG_4_3 security-fix branch dated after the correction date or higher, as it has been reported to fix this vulnerability. In addition, FreeBSD has released a patch for some older versions. Systems running NetBSD-current dated from before April 17, 2001 should be upgraded to NetBSD-current dated April 17, 2001 or later. Systems running NetBSD 1.5.x systems dated from before April 24, 2001 should be upgraded to NetBSD 1.5.x dated April 24, 2001 or later. Systems running NetBSD 1.4.x systems dated from before May 31, 2001 should be upgraded to NetBSD 1.4.x dated May 31, 2001 or later. It is also possible to temporarily correct the flaw on FreeBSD and NetBSD by implementing the following workaround: increase the value of the NMBCLUSTERS kernel option in the kernel configuration file, recompile, then install the modified kernel. It is also possible to temporarily correct the flaw on NetBSD only by implementing the following workaround: compile and install a kernel which has the sysctl(3) variable net.inet.ip.maxfragpackets in the sysctl MIB. Currently, there are no known upgrades, patches, or workarounds available to correct this issue in the Quantum Snap Server.

- 相关参考

- 漏洞作者