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CVE-2007-2443

23
FAUCET Score

CVE-2007-2443 describes an integer signedness error in the gssrpc__svcauth_unix function within the RPC library of MIT Kerberos 5 (krb5) versions 1.6.1 and earlier, impacting various distributions including Canonical and Debian Linux. This vulnerability carries a critical CVSS score of 8.3, indicating a high-risk attack vector where remote attackers could potentially execute arbitrary code by supplying a negative length value. While the vulnerability has a high FAUCET Risk Score of 95/100 and a notable EPSS score, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.6.1CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
3.1CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
6.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:6.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

8.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
6.5
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.48%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0348 is in the 93rd percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: krb5-0:1.3.4-49
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: krb5-0:1.5-26
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 2.1Fixed in: krb5-0:1.2.2-47
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: krb5-0:1.2.7-66
View patch

Vendor Advisories (1)

redhatCVE-2007-2443Important

krb5 RPC library stack overflow

Jun 26, 2007

References

patches.sgi.com / support/free/security/advisories/20070602-01-P.asc
Broken Link
docs.info.apple.com / article.html
Broken Link
h20000.www2.hp.com / bizsupport/TechSupport/Document.jsp
Broken Link
lists.apple.com / archives/security-announce//2007/Jul/msg00004.html
Mailing ListThird Party Advisory
lists.grok.org.uk / pipermail/full-disclosure/2007-September/065902.html
Third Party Advisory
osvdb.org / 36597
Broken Link
secunia.com / advisories/25800
Third Party Advisory
secunia.com / advisories/25801
Third Party Advisory
secunia.com / advisories/25814
Third Party Advisory
secunia.com / advisories/25821
Third Party Advisory
secunia.com / advisories/25870
Third Party Advisory
secunia.com / advisories/25888
Third Party Advisory
secunia.com / advisories/25890
Third Party Advisory
secunia.com / advisories/25894
Third Party Advisory
secunia.com / advisories/25911
Third Party Advisory
secunia.com / advisories/26033
Third Party Advisory
secunia.com / advisories/26228
Third Party Advisory
secunia.com / advisories/26235
Third Party Advisory
secunia.com / advisories/26909
Third Party Advisory
secunia.com / advisories/27706
Third Party Advisory
secunia.com / advisories/40346
Third Party Advisory
security.gentoo.org / glsa/glsa-200707-11.xml
Third Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/35085
Third Party AdvisoryVDB Entry
issues.rpath.com / browse/RPL-1499
Broken Link
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11277
Broken LinkThird Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7131
Broken LinkThird Party Advisory
secure-support.novell.com / KanisaPlatform/Publishing/773/3248163_f.SAL_Public.html
Broken Link
web.mit.edu / kerberos/advisories/MITKRB5-SA-2007-004.txt
PatchVendor Advisory
web.mit.edu / kerberos/www/advisories/MITKRB5-SA-2007-004.txt
PatchVendor Advisory
debian.org / security/2007/dsa-1323
Third Party Advisory
kb.cert.org / vuls/id/365313
PatchThird Party AdvisoryUS Government Resource
mandriva.com / security/advisories
Third Party Advisory
novell.com / linux/security/advisories/2007_38_krb5.html
Broken Link
redhat.com / support/errata/RHSA-2007-0384.html
Third Party Advisory
redhat.com / support/errata/RHSA-2007-0562.html
Third Party Advisory
securityfocus.com / archive/1/472288/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / archive/1/472432/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / archive/1/472507/30/5970/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/24657
Third Party AdvisoryVDB Entry
securityfocus.com / bid/25159
Third Party AdvisoryVDB Entry
securitytracker.com / id
Third Party AdvisoryVDB Entry
trustix.org / errata/2007/0021
Broken Link
ubuntu.com / usn/usn-477-1
Third Party Advisory
us-cert.gov / cas/techalerts/TA07-177A.html
PatchThird Party AdvisoryUS Government Resource
vupen.com / english/advisories/2007/2337
Third Party Advisory
vupen.com / english/advisories/2007/2491
Third Party Advisory
vupen.com / english/advisories/2007/2732
Third Party Advisory
vupen.com / english/advisories/2007/3229
Third Party Advisory
vupen.com / english/advisories/2010/1574
Third Party Advisory