This is an automated email from the ASF dual-hosted git repository. pkarwasz pushed a commit to branch fix/new-cves in repository https://gitbox.apache.org/repos/asf/logging-site.git
commit 25c85a6c597b73c08e871e735c499d82174ce304 Author: Piotr P. Karwasz <[email protected]> AuthorDate: Fri Apr 10 14:31:15 2026 +0200 Add details for CVE-2026-34478 --- .../modules/ROOT/pages/_vulnerabilities.adoc | 41 +++++++++++++++ src/site/static/cyclonedx/vdr.xml | 61 +++++++++++++++++++++- 2 files changed, 101 insertions(+), 1 deletion(-) diff --git a/src/site/antora/modules/ROOT/pages/_vulnerabilities.adoc b/src/site/antora/modules/ROOT/pages/_vulnerabilities.adoc index a9bf0a60..2500039a 100644 --- a/src/site/antora/modules/ROOT/pages/_vulnerabilities.adoc +++ b/src/site/antora/modules/ROOT/pages/_vulnerabilities.adoc @@ -29,6 +29,47 @@ Version ranges follow the https://github.com/package-url/vers-spec/blob/main/VER For brevity, mathematical interval notation is used, with the union operator (`∪`) to represent multiple ranges. ==== +[#CVE-2026-34478] +== {cve-url-prefix}/CVE-2026-34478[CVE-2026-34478] + +[cols="1h,5"] +|=== +|Summary |Log injection in `Rfc5424Layout` due to silent configuration incompatibility +|CVSS 4.x Score & Vector |6.9 MEDIUM (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N) +|Components affected |Log4j Core +|Versions affected |`[2.21.0, 2.25.4) ∪ [3.0.0-beta1, 3.0.0-beta3]` +|Versions fixed |`2.25.4` +|=== + +[#CVE-2026-34478-description] +=== Description + +Apache Log4j Core's +https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout[`Rfc5424Layout`], +in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes. + +Two distinct issues affect users of stream-based syslog services who configure `Rfc5424Layout` directly: + +* The `newLineEscape` attribute was silently renamed, causing newline escaping to stop working for users of TCP framing (RFC 6587), exposing them to CRLF injection in log output. +* The `useTlsMessageFormat` attribute was silently renamed, causing users of TLS framing (RFC 5425) to be silently downgraded to unframed TCP (RFC 6587), without newline escaping. + +Users of the `SyslogAppender` are not affected, as its configuration attributes were not modified. + +[#CVE-2026-34478-remediation] +=== Remediation + +Users are advised to upgrade to Apache Log4j Core version `2.25.4`, which corrects this issue. + +[#CVE-2026-34478-credits] +=== Credits + +This issue was discovered by Samuli Leinonen. + +[#CVE-2026-34478-references] +=== References +* {cve-url-prefix}/CVE-2026-34478[CVE-2026-34478] +* https://github.com/apache/logging-log4j2/pull/4074[Pull request that fixes the issue] + [#CVE-2026-34477] == {cve-url-prefix}/CVE-2026-34477[CVE-2026-34477] diff --git a/src/site/static/cyclonedx/vdr.xml b/src/site/static/cyclonedx/vdr.xml index 9ed0a4fe..ba47b68f 100644 --- a/src/site/static/cyclonedx/vdr.xml +++ b/src/site/static/cyclonedx/vdr.xml @@ -40,7 +40,7 @@ <bom xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xmlns="http://cyclonedx.org/schema/bom/1.6"; xsi:schemaLocation="http://cyclonedx.org/schema/bom/1.6 https://cyclonedx.org/schema/bom-1.6.xsd"; - version="7" + version="6" serialNumber="urn:uuid:dfa35519-9734-4259-bba1-3e825cf4be06"> <metadata> @@ -89,6 +89,65 @@ <vulnerabilities> + <vulnerability> + <id>CVE-2026-34478</id> + <source> + <name>NVD</name> + <url>https://nvd.nist.gov/vuln/detail/CVE-2026-34478</url> + </source> + <ratings> + <rating> + <source> + <name>The Apache Software Foundation</name> + <url> + <![CDATA[https://www.first.org/cvss/calculator/4-0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N]]></url> + </source> + <score>6.9</score> + <severity>medium</severity> + <method>CVSSv4</method> + <vector>AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N</vector> + </rating> + </ratings> + <cwes> + <cwe>684</cwe> + <cwe>117</cwe> + </cwes> + <description><![CDATA[Apache Log4j Core's +https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout[`Rfc5424Layout`], +in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes. + +Two distinct issues affect users of stream-based syslog services who configure `Rfc5424Layout` directly: + +* The `newLineEscape` attribute was silently renamed, causing newline escaping to stop working for users of TCP framing (RFC 6587), exposing them to CRLF injection in log output. +* The `useTlsMessageFormat` attribute was silently renamed, causing users of TLS framing (RFC 5425) to be silently downgraded to unframed TCP (RFC 6587), without newline escaping. + +Users of the `SyslogAppender` are not affected, as its configuration attributes were not modified.]]></description> + <recommendation><![CDATA[Users are advised to upgrade to Apache Log4j Core version `2.25.4`, which corrects this issue.]]></recommendation> + <created>2026-04-10T11:53:17Z</created> + <published>2026-04-10T11:53:17Z</published> + <updated>2026-04-10T11:53:17Z</updated> + <credits> + <individuals> + <individual> + <name>Samuli Leinonen</name> + </individual> + </individuals> + </credits> + <affects> + <target> + <ref>log4j-core</ref> + <versions> + <version> + <range><![CDATA[vers:maven/>=2.21.0|<2.25.4]]></range> + </version> + <version> + <range><![CDATA[vers:maven/>=3.0.0-beta1|<=3.0.0-beta3]]></range> + </version> + </versions> + </target> + </affects> + </vulnerability> + <vulnerability> <id>CVE-2026-34477</id> <source>
