CVE-2009-1955 describes a denial-of-service vulnerability in the expat XML parser used by Apache APR-util, specifically affecting Apache HTTP Server's mod_dav and mod_dav_svn modules, as well as products from Apple, Oracle, and various Linux distributions. This flaw allows remote attackers to exhaust memory by sending crafted XML documents with deeply nested entity references, such as through a PROPFIND request. Rated with a CVSS score of 7.5 (HIGH), it is easily exploitable over the network with low attack complexity, leading to a high impact on availability. While not actively exploited in the wild or on the KEV catalog, public exploit code exists on ExploitDB, though it has garnered minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.3.7CPE matchmatch criteria | cpe:2.3:a:apache:apr-util:*:*:*:*:*:*:*:* | ||
< 10.6.2CPE matchmatch criteria | cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* | ||
9CPE matchmatch criteria | cpe:2.3:o:suse:linux_enterprise_server:9:*:*:*:*:*:*:* | ||
4.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:* | ||
6.06CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.