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发信人: yuhuan.bbs@ytht.net (玻璃罩子~~压帮郎君~~天上掉宝), 信区: BBSDev 标题: 二月二，龙抬头，走过路过别错过发信站: YTHT (Tue Mar 4 09:05:27 2003) 转信站: WHU!news.tiaozhan.com!news.happynet.org!YTHT Sendmail is a widely used Mail Transport Agent (MTA) which is included in all Red Hat Linux distributions. During a code audit of Sendmail by ISS, a critical vulnerability was uncovered that affects unpatched versions of Sendmail prior to version 8.12.8. A remote attacker can send a carefully crafted email message which, when processed by sendmail, causes arbitrary code to be executed as root. We are advised that a proof-of-concept exploit is known to exist, but is not believed to be in the wild. Since this is a message-based vulnerability, MTAs other than Sendmail may pass on the carefully crafted message. This means that unpatched versions of Sendmail inside a network could still be at risk even if they do not accept external connections directly. In addition, the restricted shell (SMRSH) in Sendmail allows attackers to bypass the intended restrictions of smrsh by inserting additional commands after "\|\|" sequences or "/" characters, which are not properly filtered or verified. A sucessful attack would allow an attacker who has a local account on a system which has explicitly enabled smrsh to execute arbitrary binaries as themselves by utilizing their .forward file. -- 我代表一塌糊涂 BBS(ytht.net) 向社会各界诚征系统维护(业余劳动，没有工资待遇) 要求：1. 热爱祖国，热爱ytht，有成为bbs系统开发人员的远大理想 2. 在校学生，北大本科生优先考虑 3. 会 C 语言，熟悉 Linux 下 C 语言程序开发者优先考虑 4. 有 bbs 系统开发经验者请 mail 我 (yuhuan.bbs@ytht.net) 5. 没有 bbs 系统开发经验者也请 mail 我，地址见上 ※ 来源:．一塌糊涂 BBS ytht.net．[FROM: 162.105.213.171]
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发信人: yuhuan.bbs@ytht.net (玻璃罩子~~压帮郎君~~天上掉宝), 信区: BBSDev
标  题: 二月二，龙抬头，走过路过别错过
发信站: YTHT (Tue Mar  4 09:05:27 2003)
转信站: WHU!news.tiaozhan.com!news.happynet.org!YTHT

Sendmail is a widely used Mail Transport Agent (MTA) which is included
in all Red Hat Linux distributions.

During a code audit of Sendmail by ISS, a critical vulnerability was
uncovered that affects unpatched versions of Sendmail prior to version
8.12.8.  A remote attacker can send a carefully crafted email message
which, when processed by sendmail, causes arbitrary code to be
executed as root.

We are advised that a proof-of-concept exploit is known to exist, but
is not believed to be in the wild.

Since this is a message-based vulnerability, MTAs other than Sendmail
may pass on the carefully crafted message.  This means that unpatched
versions of Sendmail inside a network could still be at risk even if
they do not accept external connections directly.

In addition, the restricted shell (SMRSH) in Sendmail  allows attackers to
bypass the intended restrictions of smrsh by inserting additional commands
after "||" sequences or "/" characters, which are not properly filtered or
verified.  A sucessful attack would allow an attacker who has a local
account on a system which has explicitly enabled smrsh to execute arbitrary
binaries as themselves by utilizing their .forward file.

--
我代表一塌糊涂 BBS(ytht.net)  向社会各界诚征系统维护(业余劳动，没有工资待遇)
要求：1. 热爱祖国，热爱ytht，有成为bbs系统开发人员的远大理想
      2. 在校学生，北大本科生优先考虑
      3. 会 C 语言，熟悉 Linux 下 C 语言程序开发者优先考虑
      4. 有 bbs 系统开发经验者请 mail 我 (yuhuan.bbs@ytht.net)
      5. 没有 bbs 系统开发经验者也请 mail 我，地址见上

※ 来源:．一塌糊涂 BBS ytht.net．[FROM: 162.105.213.171]

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