How severe is CVE-2011-1930?

CVE-2011-1930 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2011-1930 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1930?

CVE-2011-1930 primarily affects Klibc Project Klibc. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1930?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-1930 published?

CVE-2011-1930 was published on 2019-11-14 and last updated on 2026-06-16.

CVE-2011-1930

CVE-2011-1930 is a critical-severity vulnerability in Klibc Project Klibc with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Klibc Project Klibc
Published: 2019-11-14
Last modified: 2026-06-16

Description

In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped. This may allow a remote attacker to send a specially crafted DHCP reply which could execute arbitrary code with the privileges of any process which sources DHCP options.

Frequently asked questions

What is CVE-2011-1930?: In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped. This may allow a remote attacker to send a specially crafted DHCP reply which could execute arbitrary code with the privileges of any process which sources DHCP options.
How severe is CVE-2011-1930?: CVE-2011-1930 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2011-1930 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1930?: CVE-2011-1930 primarily affects Klibc Project Klibc. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1930?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-1930 published?: CVE-2011-1930 was published on 2019-11-14 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:klibc_project:klibc:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Klibc Project Klibc

CVE-2021-31873 — Critical (CVSS 9.8): An issue was discovered in klibc before 2.0.9. Additions in the malloc() function may result in an integer overflow and…
CVE-2021-31872 — Critical (CVSS 9.8): An issue was discovered in klibc before 2.0.9. Multiple possible integer overflows in the cpio command on 32-bit…
CVE-2021-31870 — Critical (CVSS 9.8): An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer…
CVE-2021-31871 — High (CVSS 7.5): An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer…

All CVEs affecting Klibc Project Klibc →