The remote host is affected by the vulnerability described in GLSA-200907-05 (git: git-daemon Denial of Service)

    Shawn O. Pearce reported that git-daemon runs into an infinite loop     when handling requests that contain unrecognized arguments.
  Impact :

    A remote unauthenticated attacker could send a specially crafted     request to git-daemon, possibly leading to a Denial of Service (CPU     consumption).
  Workaround :

    There is no known workaround at this time.

SecurityFocus reports :

Git is prone to a denial-of-service vulnerability because it fails to properly handle some client requests.

Attackers can exploit this issue to cause a daemon process to enter an infinite loop. Repeated exploits may consume excessive system resources, resulting in a denial of service condition.

This update fixes a Denial of Service vulnerability in git-daemon. It also fixes minor issues when using git-cvsimport and the formatting of the git-daemon xinetd service description.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

評判の高い分散型リビジョンコントロールシステムであり、git-core の一部である git-daemon は、サービス拒否攻撃に脆弱であることが判明しました。この攻撃は、認識されない余分な引数を含むリクエストを処理する際に、プログラムの誤りにより引き起こされ、無限ループをもたらします。これは、リクエストごとに新たな git-daemon インスタンスを生成させるため、デーモン自身に対する問題はありませんが、非常に高い CPU 消費をもたらすままであるため、サービス拒否状態を引き起こす場合があります。

git で脆弱性が見つかり、修正されました：

git 1.4.4.5 から 1.6.3 までの git-daemon において、リモートの攻撃者は、認識されない余剰引数を含むリクエストを介して、サービス拒否（無限ループおよび CPU 消費）を引き起こす可能性があります（CVE-2009-2108）。

この更新は、この脆弱性を修正します。

It was discovered that git-daemon which is part of git-core, a popular distributed revision control system, is vulnerable to denial of service attacks caused by a programming mistake in handling requests containing extra unrecognized arguments which results in an infinite loop. While this is no problem for the daemon itself as every request will spawn a new git-daemon instance, this still results in a very high CPU consumption and might lead to denial of service conditions.

This update fixes a Denial of Service vulnerability in git-daemon.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

A vulnerability has been found and corrected in git :

git-daemon in git 1.4.4.5 through 1.6.3 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a request containing extra unrecognized arguments (CVE-2009-2108).

This update provides fixes for this vulnerability.

ID	名稱	產品	系列	已發布	已更新	嚴重性
39776	GLSA-200907-05 : git: git-daemon Denial of Service	Nessus	Gentoo Local Security Checks	2009/7/13	2021/1/6	medium
39408	FreeBSD : git -- denial of service vulnerability (d9b01c08-59b3-11de-828e-00e0815b8da8)	Nessus	FreeBSD Local Security Checks	2009/6/16	2021/1/6	medium
39507	Fedora 9 : git-1.6.0.6-4.fc9 (2009-6809)	Nessus	Fedora Local Security Checks	2009/6/25	2021/1/11	medium
44706	Debian DSA-1841-1：git-core - サービス拒否	Nessus	Debian Local Security Checks	2010/2/24	2021/1/4	medium
48150	Mandriva Linux セキュリティアドバイザリ：git（MDVSA-2009:155）	Nessus	Mandriva Local Security Checks	2010/7/30	2021/1/6	medium
39509	Fedora 10 : git-1.6.0.6-4.fc10 (2009-6839)	Nessus	Fedora Local Security Checks	2009/6/25	2021/1/11	medium
44706	Debian DSA-1841-1 : git-core - denial of service	Nessus	Debian Local Security Checks	2010/2/24	2021/1/4	medium
39513	Fedora 11 : git-1.6.2.5-1.fc11 (2009-6936)	Nessus	Fedora Local Security Checks	2009/6/25	2021/1/11	medium
48150	Mandriva Linux Security Advisory : git (MDVSA-2009:155)	Nessus	Mandriva Local Security Checks	2010/7/30	2021/1/6	medium

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