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| author | Florian Weimer <fweimer@redhat.com> | 2018-11-27 16:12:43 +0100 |
|---|---|---|
| committer | Pranav Kant <prka@google.com> | 2024-01-12 23:20:06 +0000 |
| commit | ac5b88042331d3a6ba0e44f8ebcc41a35ec1dab2 (patch) | |
| tree | dc37f02acfd00e9271b6c9b0379c490c9301c9af | |
| parent | 66bec53f073ca8ef6ac138dfe22ae9af7ce1d9db (diff) | |
| download | glibc-ac5b88042331d3a6ba0e44f8ebcc41a35ec1dab2.tar glibc-ac5b88042331d3a6ba0e44f8ebcc41a35ec1dab2.tar.gz glibc-ac5b88042331d3a6ba0e44f8ebcc41a35ec1dab2.tar.bz2 glibc-ac5b88042331d3a6ba0e44f8ebcc41a35ec1dab2.zip | |
CVE-2018-19591: if_nametoindex: Fix descriptor for overlong name [BZ #23927]
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | NEWS | 4 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/if_index.c | 11 |
3 files changed, 18 insertions, 5 deletions
@@ -31,6 +31,13 @@ * resolv/tst-resolv-nondecimal.c: Likewise. * sysdeps/posix/getaddrinfo.c (gaih_inet): Call __inet_aton_exact. +2018-11-27 Florian Weimer <fweimer@redhat.com> + + [BZ #23927] + CVE-2018-19591 + * sysdeps/unix/sysv/linux/if_index.c (__if_nametoindex): Avoid + descriptor leak in case of ENODEV error. + 2018-05-18 Joseph Myers <joseph@codesourcery.com> [BZ #22639] @@ -38,6 +45,7 @@ * time/tst-y2039.c: New file. * time/Makefile (tests): Add tst-y2039. + 2018-02-12 Zack Weinberg <zackw@panix.com> [BZ #19239] @@ -32,6 +32,10 @@ Security related changes: addresses with arbitrary trailing characters, potentially leading to data or command injection issues in applications. + CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a + denial of service due to resource exhaustion when processing getaddrinfo + calls with crafted host names. Reported by Guido Vranken. + CVE-2017-18269: An SSE2-based memmove implementation for the i386 architecture could corrupt memory. Reported by Max Horn. diff --git a/sysdeps/unix/sysv/linux/if_index.c b/sysdeps/unix/sysv/linux/if_index.c index e3d08982d9..782fc5e175 100644 --- a/sysdeps/unix/sysv/linux/if_index.c +++ b/sysdeps/unix/sysv/linux/if_index.c @@ -38,11 +38,6 @@ __if_nametoindex (const char *ifname) return 0; #else struct ifreq ifr; - int fd = __opensock (); - - if (fd < 0) - return 0; - if (strlen (ifname) >= IFNAMSIZ) { __set_errno (ENODEV); @@ -50,6 +45,12 @@ __if_nametoindex (const char *ifname) } strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + + int fd = __opensock (); + + if (fd < 0) + return 0; + if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0) { int saved_errno = errno; |