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CVE-2007-0493

26
FAUCET Score

CVE-2007-0493 describes a use-after-free vulnerability in specific versions of ISC BIND (9.3.0-9.3.3, 9.4.0a1-9.4.0a6, 9.4.0b1-9.4.0b4, 9.4.0rc1, and 9.5.0a1). This flaw allows remote, unauthenticated attackers to trigger a denial of service by causing the named daemon to crash through dereferencing a freed fetch context. With a CVSS score of 7.8, this vulnerability is considered highly severe, requiring no authentication or complex attack vectors, and leading to complete availability loss. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
9.3.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.3.0:*:*:*:*:*:*:*
9.3.1CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.3.1:*:*:*:*:*:*:*
9.3.2CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.3.2:*:*:*:*:*:*:*
9.4.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.4.0:*:*:*:*:*:*:*
9.4.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.4.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
12.08%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1208 is in the 93rd percentile among its peer group of 51,553 CVEs.

Social Chatter

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.

Media 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.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: bind-30:9.3.3-8.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-0493Important

bind use-after-free

Jan 25, 2007

References

docs.info.apple.com / article.html
fedoranews.org / cms/node/2507
fedoranews.org / cms/node/2537
ftp.netbsd.org / pub/NetBSD/security/advisories/NetBSD-SA2007-003.txt.asc
h20000.www2.hp.com / bizsupport/TechSupport/Document.jsp
lists.apple.com / archives/security-announce/2007/May/msg00004.html
lists.grok.org.uk / pipermail/full-disclosure/2007-January/052018.html
lists.suse.com / archive/suse-security-announce/2007-Jan/0016.html
marc.info
secunia.com / advisories/23904
Vendor Advisory
secunia.com / advisories/23924
secunia.com / advisories/23943
secunia.com / advisories/23972
secunia.com / advisories/23974
secunia.com / advisories/23977
secunia.com / advisories/24014
secunia.com / advisories/24048
secunia.com / advisories/24054
secunia.com / advisories/24129
secunia.com / advisories/24203
secunia.com / advisories/24930
secunia.com / advisories/24950
secunia.com / advisories/25402
secunia.com / advisories/25649
security.freebsd.org / advisories/FreeBSD-SA-07:02.bind.asc
security.gentoo.org / glsa/glsa-200702-06.xml
securitytracker.com / id
h20564.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
issues.rpath.com / browse/RPL-989
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9614
www2.itrc.hp.com / service/cki/docDisplay.do
isc.org / index.pl
isc.org / index.pl
Patch
isc.org / index.pl
Patch
mandriva.com / security/advisories
openpkg.com / security/advisories/OpenPKG-SA-2007.007.html
redhat.com / support/errata/RHSA-2007-0057.html
securityfocus.com / archive/1/458066/100/0/threaded
securityfocus.com / bid/22229
trustix.org / errata/2007/0005
ubuntu.com / usn/usn-418-1
vupen.com / english/advisories/2007/0349
vupen.com / english/advisories/2007/1401
vupen.com / english/advisories/2007/1939
vupen.com / english/advisories/2007/2163
vupen.com / english/advisories/2007/2315