The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 do
The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.
- Published
- Jul 17, 2011
- Updated
- Jun 16, 2026
- EPSS
- 4.2% · 91th percentile
- CWE
- CWE-119
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 4.2%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| libpng | libpng | cpe:2.3:a:libpng:libpng |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux10.04
- canonical ubuntu linux10.10
- canonical ubuntu linux11.04
- canonical ubuntu linux8.04
- debian debian linux5.0
- debian debian linux6.0
- fedoraproject fedora14
- libpng libpng1.0.0 and later · before 1.0.55
- libpng libpng1.5.0 and later · before 1.5.4
- libpng libpng1.4.0 and later · before 1.4.8
- libpng libpng1.2.0 and later · before 1.2.45
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:5.0 | libpng | before 1.2.27-2+lenny5 | 1.2.27-2+lenny5 |
| Debian:6.0 | libpng | before 1.2.44-1+squeeze1 | 1.2.44-1+squeeze1 |
| openSUSE:Tumbleweed | libpng16 | before 1.6.26-1.1 | 1.6.26-1.1 |
| Red Hat:enterprise_linux:4::as | libpng | before 2:1.2.7-8.el4 | 2:1.2.7-8.el4 |
| Red Hat:enterprise_linux:4::as | libpng-debuginfo | before 2:1.2.7-8.el4 | 2:1.2.7-8.el4 |
| Red Hat:enterprise_linux:4::as | libpng-devel | before 2:1.2.7-8.el4 | 2:1.2.7-8.el4 |
| Red Hat:enterprise_linux:4::as | libpng10 | before 0:1.0.16-9.el4 | 0:1.0.16-9.el4 |
| Red Hat:enterprise_linux:4::as | libpng10-debuginfo | before 0:1.0.16-9.el4 | 0:1.0.16-9.el4 |
| Red Hat:enterprise_linux:4::as | libpng10-devel | before 0:1.0.16-9.el4 | 0:1.0.16-9.el4 |
| Red Hat:enterprise_linux:5::client | libpng | before 2:1.2.10-7.1.el5_7.5 | 2:1.2.10-7.1.el5_7.5 |
| Red Hat:enterprise_linux:5::client | libpng-debuginfo | before 2:1.2.10-7.1.el5_7.5 | 2:1.2.10-7.1.el5_7.5 |
| Red Hat:enterprise_linux:5::client_workstation | libpng-devel | before 2:1.2.10-7.1.el5_7.5 | 2:1.2.10-7.1.el5_7.5 |
| Red Hat:enterprise_linux:6::server | libpng | before 2:1.2.46-1.el6_1 | 2:1.2.46-1.el6_1 |
| Red Hat:enterprise_linux:6::server | libpng-debuginfo | before 2:1.2.46-1.el6_1 | 2:1.2.46-1.el6_1 |
| Red Hat:enterprise_linux:6::server | libpng-devel | before 2:1.2.46-1.el6_1 | 2:1.2.46-1.el6_1 |
| Red Hat:enterprise_linux:6::server | libpng-static | before 2:1.2.46-1.el6_1 | 2:1.2.46-1.el6_1 |
Same product
libpng: all recordsOther highest-scoring records for the same primary product.
- CVE-2010-1205Buffer overflow in pngpread.c in libpng before 1.2.44 and 1.4.x before 1.4.3, as used in progressive applications, might allow remote attack52Plan
- CVE-2017-12652libpng before 1.6.32 does not properly check the length of chunks against the user limit.40Plan
- CVE-2015-8540Integer underflow in the png_check_keyword function in pngwutil.c in libpng 0.90 through 0.99, 1.0.x before 1.0.66, 1.1.x and 1.2.x before 137Monitor
- CVE-2018-14550An issue has been found in third-party PNM decoding associated with libpng 1.6.35.36Monitor
- CVE-2015-0973Buffer overflow in the png_read_IDAT_data function in pngrutil.c in libpng before 1.5.21 and 1.6.x before 1.6.16 allows context-dependent at36Monitor
- CVE-2014-9495Heap-based buffer overflow in the png_combine_row function in libpng before 1.5.21 and 1.6.x before 1.6.16, when running on 64-bit systems, 36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:libpng | 1.2.44-1+squeeze1 · Debian:6.0 | Package registry (OSV) |
| opensuse:libpng16 | 1.6.26-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:libpng | 2:1.2.7-8.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpng-debuginfo | 2:1.2.7-8.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpng-devel | 2:1.2.7-8.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpng-static | 2:1.2.46-1.el6_1 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:libpng10 | 0:1.0.16-9.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpng10-debuginfo | 0:1.0.16-9.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:libpng10-devel | 0:1.0.16-9.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
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References
- libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng%3Ba=commit%3Bh=61a2d8a2a7b03023e63eae9a3e64607aaaa6d339
- lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- lists.apple.com/archives/security-announce/2012/May/msg00001.html
- lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
- secunia.com/advisories/45046
- secunia.com/advisories/45405
- secunia.com/advisories/45415
- secunia.com/advisories/45445
- secunia.com/advisories/45460
- secunia.com/advisories/45461
- secunia.com/advisories/45492
- secunia.com/advisories/49660
- security.gentoo.org/glsa/glsa-201206-15.xml
- support.apple.com/kb/HT5002
- support.apple.com/kb/HT5281
- www.debian.org/security/2011/dsa-2287
- www.kb.cert.org/vuls/id/819894
- www.libpng.org/pub/png/libpng.html
- www.mandriva.com/security/advisories?name=MDVSA-2011:151
- www.openwall.com/lists/oss-security/2011/07/13/2
Vendor advisories and official records. Exploit/PoC links are deliberately left out.