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CVE-2020-29573

CVE-2020-29573

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

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.

CVSS 7.5 · High · EPSS 2.7% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • glibc Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.23-1

    Update to 2.23-1

  • glibc Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.23-1

    Update to 2.23-1

  • glibc Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.23-1

    Update to 2.23-1

  • 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
    • 2.19-0ubuntu6.15+esm3
    • 2.19-0ubuntu6.15+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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