Headline
RHSA-2022:8226: Red Hat Security Advisory: python-lxml security update
An update for python-lxml is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Related CVEs:
- CVE-2022-2309: lxml: NULL Pointer Dereference in lxml
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Issued:
2022-11-15
Updated:
2022-11-15
RHSA-2022:8226 - Security Advisory
- Overview
- Updated Packages
Synopsis
Moderate: python-lxml security update
Type/Severity
Security Advisory: Moderate
Red Hat Insights patch analysis
Identify and remediate systems affected by this advisory.
View affected systems
Topic
An update for python-lxml is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
lxml is an XML processing library providing access to libxml2 and libxslt libraries using the Python ElementTree API.
Security Fix(es):
- lxml: NULL Pointer Dereference in lxml (CVE-2022-2309)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.1 Release Notes linked from the References section.
Affected Products
- Red Hat Enterprise Linux for x86_64 9 x86_64
- Red Hat Enterprise Linux for IBM z Systems 9 s390x
- Red Hat Enterprise Linux for Power, little endian 9 ppc64le
- Red Hat Enterprise Linux for ARM 64 9 aarch64
Fixes
- BZ - 2107571 - CVE-2022-2309 lxml: NULL Pointer Dereference in lxml
References
- https://access.redhat.com/security/updates/classification/#moderate
- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.1_release_notes/index
Red Hat Enterprise Linux for x86_64 9
SRPM
python-lxml-4.6.5-3.el9.src.rpm
SHA-256: 02ffeccb35359a734605efb9466a9d5bd946e5f6d1e280bb11eafa97d1afc5c9
x86_64
python-lxml-debugsource-4.6.5-3.el9.x86_64.rpm
SHA-256: d1243fd8126d0c6af07b58f26676bbe79d5c8cc0b41a6d3bc57c0f3e1bbfe8f1
python3-lxml-4.6.5-3.el9.x86_64.rpm
SHA-256: 2f3ad8da0aa342fcc7343b0a7963aba93e1253f4109a18f46d5a02ac9e030766
python3-lxml-debuginfo-4.6.5-3.el9.x86_64.rpm
SHA-256: 333a79f770cbe185cfd01e3ac1c210da9eba5e831bcd09c01afa7217cafa9138
Red Hat Enterprise Linux for IBM z Systems 9
SRPM
python-lxml-4.6.5-3.el9.src.rpm
SHA-256: 02ffeccb35359a734605efb9466a9d5bd946e5f6d1e280bb11eafa97d1afc5c9
s390x
python-lxml-debugsource-4.6.5-3.el9.s390x.rpm
SHA-256: d6bb7dd20d5d8279d7ba21e6f868fee73aff8c6eaac5e94482febac690e70149
python3-lxml-4.6.5-3.el9.s390x.rpm
SHA-256: 5a8c8301f0739e9355d5a1b559d9f6d7d4c9da9b76417c223db92822716deb11
python3-lxml-debuginfo-4.6.5-3.el9.s390x.rpm
SHA-256: ac2df580a2e16ace90d7b0f84fe9b6964b3eff7318fa289119b0273f6f2fde5d
Red Hat Enterprise Linux for Power, little endian 9
SRPM
python-lxml-4.6.5-3.el9.src.rpm
SHA-256: 02ffeccb35359a734605efb9466a9d5bd946e5f6d1e280bb11eafa97d1afc5c9
ppc64le
python-lxml-debugsource-4.6.5-3.el9.ppc64le.rpm
SHA-256: fb495b8e128062504799eb9d13533f802ca9c9416538ce5b7cfa4bf0408d44ff
python3-lxml-4.6.5-3.el9.ppc64le.rpm
SHA-256: 135cbff34ceb6f8b478416cb190f7554a0eb761bd5aa4db16aab2bba038dd16d
python3-lxml-debuginfo-4.6.5-3.el9.ppc64le.rpm
SHA-256: 19eb06748c993ba8c2ea1a5089bb3009f11873e3ccdcff7d13d5f638a7d90b87
Red Hat Enterprise Linux for ARM 64 9
SRPM
python-lxml-4.6.5-3.el9.src.rpm
SHA-256: 02ffeccb35359a734605efb9466a9d5bd946e5f6d1e280bb11eafa97d1afc5c9
aarch64
python-lxml-debugsource-4.6.5-3.el9.aarch64.rpm
SHA-256: f9f04313c8f28e09bbb8de76ef6cb4788d02d0b9cdeae321f0ef67d0288065ac
python3-lxml-4.6.5-3.el9.aarch64.rpm
SHA-256: 9191d0e614f8402ca47e54e807e3f0b577d793e4a77481f1ea4f84d72b7deccd
python3-lxml-debuginfo-4.6.5-3.el9.aarch64.rpm
SHA-256: 6cb2f77cbddec3429cfaa880fde72f8abdee5e90ec62b4e2b4aa117fea996d26
The Red Hat security contact is [email protected]. More contact details at https://access.redhat.com/security/team/contact/.
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NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.
NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.