CVE-2016-6263: gnu libidn Out-of-bounds Read
CVSS: 7.5v3.0HighModified
AliasesALPINE-CVE-2016-6263UBUNTU-CVE-2016-6263DEBIAN-CVE-2016-6263
Published 07-09-2016Last modified 06-08-2024
Vulnerability summary
CVE-2016-6263 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in gnu libidn. EPSS estimates a 3.88% chance of exploitation in the next 30 days, higher than 90.1% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.0 (NVD)EPSS score
3.88%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 3Timeline
- 07-09-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The stringprep_utf8_nfkc_normalize function in lib/nfkc.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted UTF-8 data.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.88%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
0.00 pp
From 3.88% on 19-09-2026
19-09-202619-10-2026
EPSS score3.88%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- libidn< 1.33-r0
Debian1 product
- libidn< 1.33-1
Gnu1 product
- libidn≤ 1.32
Ubuntu1 product
- libidn< 1.28-1ubuntu2.1 | < 1.32-3ubuntu1.1
4 vendors · 4 products
References
17 links- lists.opensuse.org/opensuse-updates/2016-08/msg00098.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
- www.openwall.com/lists/oss-security/2016/07/20/6Mailing ListX Refsource MLISTThird Party AdvisoryREPORT
- lists.opensuse.org/opensuse-updates/2016-08/msg00005.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
- lists.gnu.org/archive/html/help-libidn/2016-07/msg00009.htmlMailing ListX Refsource MLISTVendor AdvisoryREPORT
- git.savannah.gnu.org/cgit/libidn.git/commit/?id=1fbee57ef3c72db2206dd87e4162108b2f425555X Refsource CONFIRMIssue TrackingPatch