Description
libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libxml2 | 2.9.10+dfsg-2 | — |
| Debian 13 | libxml2 | 2.9.10+dfsg-2 | — |
| Debian 12 | libxml2 | 2.9.10+dfsg-2 | — |
| Debian 9 | libxml2 | 2.9.4+dfsg1-2.2+deb9u6 | DLA-2972-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libxml2 | 2.9.4+dfsg1-6.1ubuntu1.2 | USN-3739-1 |
| Ubuntu 16.04 LTS | libxml2 | 2.9.3+dfsg1-1ubuntu0.6 | USN-3739-1 |
| Ubuntu 14.04 LTS | libxml2 | 2.9.1+dfsg1-3ubuntu4.13 | USN-3739-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | libxml2 +1 | 2.9.4-46.20.1 | SUSE-SU-2019:1896-1 |
| SLES 12 SP2 | libxml2 +1 | 2.9.4-33.1 | SUSE-SU-2017:0380-1 |
| SLES 12 SP1 | libxml2 +1 | 2.9.1-26.12.1 | SUSE-SU-2017:1366-1 |
| SLES 11 SP4 | libxml2 | 2.7.6-0.64.1 | SUSE-SU-2019:13985-1, SUSE-SU-2017:1557-1, SUSE-SU-2017:0164-1 |
| SLES 11 SP4 | libxml2-python | 2.7.6-0.64.4 | SUSE-SU-2019:13985-1, SUSE-SU-2017:1557-1, SUSE-SU-2017:0164-1 |
| SLES 11 SP3 | libxml2 | 2.7.6-0.69.1 | SUSE-SU-2017:1557-1 |
| SLES 11 SP3 | libxml2-python | 2.7.6-0.69.3 | SUSE-SU-2017:1557-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | libxml2 +1 | 2.9.4-46.20.1 | SUSE-SU-2019:1896-1 |
| SLES for SAP 12 SP2 | libxml2 +1 | 2.9.4-33.1 | SUSE-SU-2017:0380-1 |
| SLES for SAP 12 SP1 | libxml2 +1 | 2.9.1-26.12.1 | SUSE-SU-2017:1366-1 |
| SLES for SAP 11 SP4 | libxml2 | 2.7.6-0.64.1 | SUSE-SU-2019:13985-1, SUSE-SU-2017:1557-1, SUSE-SU-2017:0164-1 |
| SLES for SAP 11 SP4 | libxml2-python | 2.7.6-0.64.4 | SUSE-SU-2019:13985-1, SUSE-SU-2017:1557-1, SUSE-SU-2017:0164-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | libxml2 | 2.7.6-0.69.1 | SUSE-SU-2019:13985-1, SUSE-SU-2017:1557-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | libxml2-python | 2.7.6-0.69.3 | SUSE-SU-2019:13985-1, SUSE-SU-2017:1557-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.23 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.22 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.21 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.20 | libxml2 | 2.9.4-r2 | — |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.18 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.17 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.16 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.15 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.14 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.13 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.12 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.11 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.10 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.9 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.8 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.7 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.6 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.5 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.4 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.3 | libxml2 | 2.9.4-r2 | — |
| Alpine v3.2 | libxml2 | 2.9.4-r2 | — |
Advisories 11
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- USN-3739-1 libxml2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2972-1 libxml2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:1896-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0164-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1366-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0380-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1557-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2024-3382 libxml2: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jun 30, 2025
- SUSE-SU-2019:13985-1 Security update for libxml2 SUSE / openSUSE Security Updates · May 2, 2025
References
- https://bugzilla.gnome.org/show_bug.cgi?id=772726
- https://github.com/lsh123/xmlsec/issues/43
- USN-3739-1 vendor-advisory
- GLSA-201711-01 vendor-advisory
- 94347 vdb-entry
- USN-3739-2 vendor-advisory
- [debian-lts-announce] 20220408 [SECURITY] [DLA 2972-1] libxml2 security update mailing-list