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CVE-2012-1147

18
FAUCET Score

CVE-2012-1147 describes a denial-of-service vulnerability in expat versions prior to 2.1.0, affecting products like Apple macOS and libexpat. An unauthenticated attacker can exploit this by providing numerous crafted XML files, leading to excessive file descriptor consumption and system unavailability. While the attack complexity is medium, the impact is limited to partial denial of service, and there is no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
10.11.0CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:10.11.0:*:*:*:*:*:*:*
10.11.1CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:10.11.1:*:*:*:*:*:*:*
<= 2.0.1CPE matchmatch criteria
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
1.95.1CPE matchmatch criteria
cpe:2.3:a:libexpat_project:libexpat:1.95.1:*:*:*:*:*:*:*
1.95.2CPE matchmatch criteria
cpe:2.3:a:libexpat_project:libexpat:1.95.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.57%
Probability of exploitation in next 30 days
EPSS Percentile
83.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0257 is in the 74th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

applevendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mingw32-expat

Vendor Advisories (1)

redhatCVE-2012-1147Low

expat: resource leak in readfilemap.c

Mar 3, 2012

References

expat.cvs.sourceforge.net / viewvc/expat/expat/xmlwf/readfilemap.c
lists.apple.com / archives/security-announce/2015/Dec/msg00005.html
Vendor Advisory
sourceforge.net / projects/expat/files/expat/2.1.0
sourceforge.net / tracker
support.apple.com / HT205637
Vendor Advisory
trac.wxwidgets.org / ticket/11194
trac.wxwidgets.org / ticket/11432
securityfocus.com / bid/52379
securitytracker.com / id/1034344