CVE-2009-3720 Memory corruption in n/a
Attackers can cause a denial of service via crafted XML documents triggering a buffer over-read in the Expat library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-3720?
CVE-2009-3720 is a medium-severity memory corruption vulnerability in Apache Http Server, published on 3 Nov 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.
Which versions are affected by CVE-2009-3720?
It affects 2 products.
Linux distribution packages (28)
4Suite Red Hat:enterprise_linux:3::as | All versions | 0:0.11.1-15 |
4Suite-debuginfo Red Hat:enterprise_linux:3::as | All versions | 0:0.11.1-15 |
4Suite Red Hat:enterprise_linux:3::desktop | All versions | 0:0.11.1-15 |
4Suite-debuginfo Red Hat:enterprise_linux:3::desktop | All versions | 0:0.11.1-15 |
4Suite Red Hat:enterprise_linux:3::es | All versions | 0:0.11.1-15 |
4Suite-debuginfo Red Hat:enterprise_linux:3::es | All versions | 0:0.11.1-15 |
4Suite Red Hat:enterprise_linux:3::ws | All versions | 0:0.11.1-15 |
4Suite-debuginfo Red Hat:enterprise_linux:3::ws | All versions | 0:0.11.1-15 |
4Suite Red Hat:enterprise_linux:4::as | All versions | 0:1.0-3.el4_8.1 |
4Suite-debuginfo Red Hat:enterprise_linux:4::as | All versions | 0:1.0-3.el4_8.1 |
PyXML Red Hat:enterprise_linux:4::as | All versions | 0:0.8.3-6.el4_8.2 |
PyXML-debuginfo Red Hat:enterprise_linux:4::as | All versions | 0:0.8.3-6.el4_8.2 |
4Suite Red Hat:enterprise_linux:4::desktop | All versions | 0:1.0-3.el4_8.1 |
4Suite-debuginfo Red Hat:enterprise_linux:4::desktop | All versions | 0:1.0-3.el4_8.1 |
PyXML Red Hat:enterprise_linux:4::desktop | All versions | 0:0.8.3-6.el4_8.2 |
PyXML-debuginfo Red Hat:enterprise_linux:4::desktop | All versions | 0:0.8.3-6.el4_8.2 |
4Suite Red Hat:enterprise_linux:4::es | All versions | 0:1.0-3.el4_8.1 |
4Suite-debuginfo Red Hat:enterprise_linux:4::es | All versions | 0:1.0-3.el4_8.1 |
PyXML Red Hat:enterprise_linux:4::es | All versions | 0:0.8.3-6.el4_8.2 |
PyXML-debuginfo Red Hat:enterprise_linux:4::es | All versions | 0:0.8.3-6.el4_8.2 |
4Suite Red Hat:enterprise_linux:4::ws | All versions | 0:1.0-3.el4_8.1 |
4Suite-debuginfo Red Hat:enterprise_linux:4::ws | All versions | 0:1.0-3.el4_8.1 |
PyXML Red Hat:enterprise_linux:4::ws | All versions | 0:0.8.3-6.el4_8.2 |
PyXML-debuginfo Red Hat:enterprise_linux:4::ws | All versions | 0:0.8.3-6.el4_8.2 |
PyXML Red Hat:enterprise_linux:5::client | All versions | 0:0.8.4-4.el5_4.2 |
PyXML-debuginfo Red Hat:enterprise_linux:5::client | All versions | 0:0.8.4-4.el5_4.2 |
PyXML Red Hat:enterprise_linux:5::server | All versions | 0:0.8.4-4.el5_4.2 |
PyXML-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:0.8.4-4.el5_4.2 |
Products include Apache Http Server, Libexpat Project Libexpat.
How do I fix CVE-2009-3720?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2009-3720 being exploited?
There is no known exploitation of CVE-2009-3720 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as AZL-43945, AZL-44685, DEBIAN-CVE-2009-3720, DSA-1921-1, GHSA-pj3x-74qr-vrr4, RHSA-2009:1572 and 2 more.