CVE-2021-30498: A flaw was found in libcaca.
Noroxi assessment
Priority: Monitor (action score 31/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 71.8% of all records.
- Someone with local access to the system 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.
- Fixed version: libcaca (Alpine:v3.15) 0.99_beta20-r0; libcaca (Debian:10) 0.99.beta19-2.1+deb10u1; libcaca (Debian:11) 0.99.beta19-2.2+deb11u1.
Low priority for now. Upgrade to libcaca (Alpine:v3.15) 0.99_beta20-r0; libcaca (Debian:10) 0.99.beta19-2.1+deb10u1; libcaca (Debian:11) 0.99.beta19-2.2+deb11u1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
A flaw was found in libcaca. A heap buffer overflow in export.c in function export_tga might lead to memory corruption and other potential consequences.
- Published
- May 26, 2021
- Updated
- Jun 16, 2026
- EPSS
- 1.3% · 71th percentile
- CWE
- CWE-787
Report tools
Action score
31
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.3%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| libcaca project | libcaca | cpe:2.3:a:libcaca_project:libcaca |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
n/a libcaca
- masteraffected
Affected versions · NVD (4)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora34
- fedoraproject fedora35
- fedoraproject fedora36
- libcaca project libcaca0.99
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.15 | libcaca | before 0.99_beta20-r0 | 0.99_beta20-r0 |
| Debian:10 | libcaca | before 0.99.beta19-2.1+deb10u1 | 0.99.beta19-2.1+deb10u1 |
| Debian:11 | libcaca | before 0.99.beta19-2.2+deb11u1 | 0.99.beta19-2.2+deb11u1 |
| Debian:12 | libcaca | before 0.99.beta19-3 | 0.99.beta19-3 |
| openSUSE:Leap 15.3 | libcaca | before 0.99.beta19.git20171003-11.3.1 | 0.99.beta19.git20171003-11.3.1 |
| openSUSE:Tumbleweed | libcaca | before 0.99.beta19.git20171003-8.3 | 0.99.beta19.git20171003-8.3 |
| SUSE:HPE Helion OpenStack 8 | libcaca | before 0.99.beta18-14.6.1 | 0.99.beta18-14.6.1 |
| SUSE:Linux Enterprise High Performance Computing 15-ESPOS | libcaca | before 0.99.beta19.git20171003-3.8.1 | 0.99.beta19.git20171003-3.8.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP3 | libcaca | before 0.99.beta19.git20171003-11.3.1 | 0.99.beta19.git20171003-11.3.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | libcaca | before 0.99.beta13b-49.3.1 | 0.99.beta13b-49.3.1 |
Same product
libcaca project: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-20549There is an illegal WRITE memory access at caca/file.c (function caca_file_read) in libcaca 0.99.beta19.36Monitor
- CVE-2018-20548There is an illegal WRITE memory access at common-image.c (function load_image) in libcaca 0.99.beta19 for 1bpp data.36Monitor
- CVE-2018-20545There is an illegal WRITE memory access at common-image.c (function load_image) in libcaca 0.99.beta19 for 4bpp data.36Monitor
Published before and after this one in the same product
- ← EarlierCVE-2018-20547Dec 28, 2018 · There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for 24bpp data.33Monitor
- ← EarlierCVE-2021-3410Feb 23, 2021 · A flaw was found in libcaca v0.99.beta19.31Monitor
- Later →CVE-2021-30499May 26, 2021 · A flaw was found in libcaca.31Monitor
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 |
|---|---|---|
| alpine:libcaca | 0.99_beta20-r0 · Alpine:v3.15 | Package registry (OSV) |
| debian:libcaca | 0.99.beta19-3 · Debian:12 | Package registry (OSV) |
| opensuse:libcaca | 0.99.beta19.git20171003-11.3.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:libcaca | 0.99.beta19.git20171003-3.8.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOS | 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.
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Someone with local access to the system 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
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (5 more)Show less
- lists.debian.org/debian-lts-announce/2024/04/msg00004.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/
- lists.debian.org/debian-lts-announce/2025/07/msg00019.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.