遠端 Redhat Enterprise Linux 6 / 7 主機上安裝的套件受到 RHSA-2019:3725 公告中提及的多個弱點影響。

  - python：在 pop3lib 中，透過 apop() 方法的規則運算式災難性回溯進行 DOS (CVE-2018-1060)

  - python：在 difflib 中，透過 difflib.IS_LINE_JUNK 方法的規則運算式回溯進行 DOS (CVE-2018-1061)

  - python：在 _elementtree.c 模組中遺漏 salt 初始化 (CVE-2018-14647)

  - python：如果序列化資料的千兆位元組，Modules/_pickle.c 中的整數溢位會導致記憶體耗盡 (CVE-2018-20406)

  - python：Cookie 網域檢查傳回錯誤結果 (CVE-2018-20852)

  - python：使用特製的 X509 憑證造成 NULL 指標解除參照 (CVE-2019-5010)

  - python：透過傳遞至 urlopen() 的 URL 查詢部分發生 CRLF 注入攻擊 (CVE-2019-9740)

  - python：透過傳遞至 urlopen() 的 URL 路徑部分發生 CRLF 注入攻擊 (CVE-2019-9947)

  - python：未記載的 local_file 通訊協定可讓遠端攻擊者繞過保護機制 (CVE-2019-9948)

  - python：email.utils.parseaddr 錯誤剖析電子郵件地址 (CVE-2019-16056)

請注意，Nessus 並未測試這些問題，而是僅根據應用程式自我報告的版本號碼作出判斷。

此 DLA 修正了剖析 x509 憑證的問題、一個 pickle 整數溢位和其他一些小問題：CVE-2016-0772 當 StartTLS 失敗時，CPython 中的 smtplib 程式庫未傳回錯誤，這可讓攔截式攻擊者透過利用用戶端和登錄之間的網路位置繞過 TLS 保護，來封鎖 StartTLS 命令 (也稱為「StartTLS 移除攻擊」)。CVE-2016-5636 CPython 的 zipimport.c 中的 get_data 函式發生整數溢位，可讓遠端攻擊者透過負的資料大小值產生不明影響，進而觸發堆積型緩衝區溢位。CVE-2016-5699 CPython 的 urllib2 和 urllib 中的 HTTPConnection.putheader 函式中發生 CRLF 插入弱點，可讓遠端攻擊者透過 URL 中的 CRLF 序列插入任意 HTTP 標頭。CVE-2018-20406 Modules/_pickle.c 透過在「調整大小到兩倍大小」嘗試期間錯誤處理的大型 LONG_BINPUT 值而產生一個整數溢位。此問題可能會造成記憶體耗盡，但是只有在 pickle 格式用於序列化數十或數百 GB 資料時才有意義。CVE-2019-5010 使用特製的 X509 認證造成 NULL 指標解除參照。針對 Debian 8「Jessie」，這些問題已在 3.4.2-1~deb8u2 版本中修正。我們建議您升級 python3.4 套件。注意：Tenable Network Security 已直接從 DLA 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

Last upstream Python 3.4 security release, 3.4.10. Security fix for CVE-2019-9636, CVE-2019-5010, CVE-2018-20406.

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

This update for python3 fixes the following issues :

Security issue fixed :

CVE-2019-5010: Fixed a denial-of-service vulnerability in the X509 certificate parser (bsc#1122191)

CVE-2018-20406: Fixed a integer overflow via a large LONG_BINPUT (bsc#1120644)

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

Multiple security issues were discovered in Python, an interactive high-level object-oriented language.

CVE-2018-20406

Modules/_pickle.c has an integer overflow via a large LONG_BINPUT value that is mishandled during a 'resize to twice the size' attempt.
This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data.

CVE-2018-20852

http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com).
When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker.

CVE-2019-5010

An exploitable denial of service vulnerability exists in the X509 certificate parser. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.

CVE-2019-9636

Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname).
The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly.

CVE-2019-9740

An issue was discovered in urllib2. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command.

CVE-2019-9947

An issue was discovered in urllib2. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue.

CVE-2019-9948

urllib supports the local_file: scheme, which makes it easier for remote attackers to bypass protection mechanisms that blacklist file:
URIs, as demonstrated by triggering a urllib.urlopen('local_file:///etc/passwd') call.

CVE-2019-10160

A security regression was discovered in python, which still allows an attacker to exploit CVE-2019-9636 by abusing the user and password parts of a URL. When an application parses user-supplied URLs to store cookies, authentication credentials, or other kind of information, it is possible for an attacker to provide specially crafted URLs to make the application locate host-related information (e.g. cookies, authentication data) and send them to a different host than where it should, unlike if the URLs had been correctly parsed. The result of an attack may vary based on the application.

CVE-2019-16056

The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340; however, this CVE applies to Python more generally.

CVE-2019-16935

The documentation XML-RPC server has XSS via the server_title field.
This occurs in Lib/xmlrpc/server.py. If set_server_title is called with untrusted input, arbitrary JavaScript can be delivered to clients that visit the http URL for this server.

CVE-2019-18348

An issue was discovered in urllib2. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue

CVE-2020-8492

Python allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.

CVE-2020-14422

Lib/ipaddress.py improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created.

For Debian 9 stretch, these problems have been fixed in version 3.5.3-1+deb9u2.

We recommend that you upgrade your python3.5 packages.

For the detailed security status of python3.5 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/python3.5

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

This update for python3 to version 3.6.10 fixes the following issues :

CVE-2017-18207: Fixed a denial of service in Wave_read._read_fmt_chunk() (bsc#1083507).

CVE-2019-16056: Fixed an issue where email parsing could fail for multiple @ (bsc#1149955).

CVE-2019-15903: Fixed a heap-based buffer over-read in libexpat (bsc#1149429).

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

This update for python3 to version 3.6.10 fixes the following issues :

  - CVE-2017-18207: Fixed a denial of service in     Wave_read._read_fmt_chunk() (bsc#1083507).

  - CVE-2019-16056: Fixed an issue where email parsing could     fail for multiple @ (bsc#1149955).

  - CVE-2019-15903: Fixed a heap-based buffer over-read in     libexpat (bsc#1149429).

This update was imported from the SUSE:SLE-15:Update update project.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
194161	RHEL 6 / 7：rh-python36-python (RHSA-2019:3725)	Nessus	Red Hat Local Security Checks	2024/4/28	2024/11/7	critical
122036	Debian DLA-1663-1：python3.4 安全性更新	Nessus	Debian Local Security Checks	2019/2/8	2024/6/21	critical
123475	Fedora 29 : python34 (2019-6b02154aa0)	Nessus	Fedora Local Security Checks	2019/3/29	2024/6/7	critical
121616	SUSE SLED12 / SLES12 Security Update : python3 (SUSE-SU-2019:0243-1)	Nessus	SuSE Local Security Checks	2019/2/6	2024/6/24	high
138529	Debian DLA-2280-1 : python3.5 security update	Nessus	Debian Local Security Checks	2020/7/16	2024/3/1	critical
133036	SUSE SLED15 / SLES15 Security Update : python3 (SUSE-SU-2020:0114-1) (BEAST) (httpoxy)	Nessus	SuSE Local Security Checks	2020/1/17	2024/3/29	critical
133172	openSUSE Security Update : python3 (openSUSE-2020-86) (BEAST) (httpoxy)	Nessus	SuSE Local Security Checks	2020/1/22	2024/3/29	critical

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