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CVE-2021-3999

CVE-2021-3999

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

CVSS 7.8 · High · EPSS 0.8% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • glibc

    Versions
    • Fixed in glibc v2.31 and above.: Affected

    No fix published

  • glibc Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.33-4

    Update to 2.33-4

  • glibc Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.33-4

    Update to 2.33-4

  • glibc Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.33-4

    Update to 2.33-4

  • eglibc Ubuntu:Pro:14.04:LTS

    Versions
    • 2.17-93ubuntu4
    • 2.18-0ubuntu1
    • 2.18-0ubuntu2
    • 2.18-0ubuntu4
    • 2.18-0ubuntu5
    • 2.18-0ubuntu6
    • 2.18-0ubuntu7
    • 2.19-0ubuntu2
    • 2.19-0ubuntu3
    • 2.19-0ubuntu4
    • 2.19-0ubuntu5
    • 2.19-0ubuntu6
    • 2.19-0ubuntu6.1
    • 2.19-0ubuntu6.3
    • 2.19-0ubuntu6.4
    • 2.19-0ubuntu6.5
    • 2.19-0ubuntu6.6
    • 2.19-0ubuntu6.7
    • 2.19-0ubuntu6.8
    • 2.19-0ubuntu6.9
    • 2.19-0ubuntu6.10
    • 2.19-0ubuntu6.11
    • 2.19-0ubuntu6.13
    • 2.19-0ubuntu6.14
    • 2.19-0ubuntu6.15
    • 2.19-0ubuntu6.15+esm1
    • 2.19-0ubuntu6.15+esm2
    Affected ranges
    • ECOSYSTEM: < 2.19-0ubuntu6.15+esm3

    Update to 2.19-0ubuntu6.15+esm3

  • glibc Ubuntu:Pro:16.04:LTS

    Versions
    • 2.21-0ubuntu4
    • 2.21-0ubuntu5
    • 2.21-0ubuntu6
    • 2.23-0ubuntu1
    • 2.23-0ubuntu2
    • 2.23-0ubuntu3
    • 2.23-0ubuntu4
    • 2.23-0ubuntu5
    • 2.23-0ubuntu6
    • 2.23-0ubuntu7
    • 2.23-0ubuntu9
    • 2.23-0ubuntu10
    • 2.23-0ubuntu11
    • 2.23-0ubuntu11.2
    • 2.23-0ubuntu11.3
    Affected ranges
    • ECOSYSTEM: < 2.23-0ubuntu11.3+esm1

    Update to 2.23-0ubuntu11.3+esm1

  • glibc Ubuntu:18.04:LTS

    Versions
    • 2.26-0ubuntu2
    • 2.26-0ubuntu2.1
    • 2.27-0ubuntu2
    • 2.27-0ubuntu3
    • 2.27-3ubuntu1
    • 2.27-3ubuntu1.2
    • 2.27-3ubuntu1.3
    • 2.27-3ubuntu1.4
    Affected ranges
    • ECOSYSTEM: < 2.27-3ubuntu1.5

    Update to 2.27-3ubuntu1.5

  • glibc Ubuntu:20.04:LTS

    Versions
    • 2.30-0ubuntu2
    • 2.30-0ubuntu3
    • 2.31-0ubuntu5
    • 2.31-0ubuntu6
    • 2.31-0ubuntu7
    • 2.31-0ubuntu9
    • 2.31-0ubuntu9.1
    • 2.31-0ubuntu9.2
    • 2.31-0ubuntu9.3
    Affected ranges
    • ECOSYSTEM: < 2.31-0ubuntu9.7

    Update to 2.31-0ubuntu9.7

Original sources

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