glibc: CVE-2014-9402 endless loop in getaddr_r
PATCH 1/1 glibc: CVE-2014-9402 endless loop in getaddr_r
From: Armin Kuster <[email protected]>
The getnetbyname function in glibc 2.21 in earlier will enter an infinite loop if the DNS backend is activated in the system Name Service Switch configuration, and the DNS resolver receives a positive answer while processing the network name.
Signed-off-by Armin Kuster <[email protected]>
--- .../CVE-2014-9402_endless-loop-in-getaddr_r.patch | 65 ++++++++++++++++++++++ meta/recipes-core/glibc/glibc_2.20.bb | 1 + 2 files changed, 66 insertions(+) create mode 100644 meta/recipes-core/glibc/glibc/CVE-2014-9402_endless-loop-in-getaddr_r.patch
meta/recipes-core/glibc/glibc/CVE-2014-9402_endless-loop-in-getaddr_r.patch new file +65 -0
@@ -0,0 +1,65 @@ +CVE-2014-9402 endless loop in getaddr_r + + +https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=11e3417af6e354f1942c68a271ae51e892b2814d + +Upstream-Status: Backport + +Signed-off-by: Armin Kuster <[email protected]> + +From 11e3417af6e354f1942c68a271ae51e892b2814d Mon Sep 17 00:00:00 2001 +From: Florian Weimer <[email protected]> +Date: Mon, 15 Dec 2014 17:41:13 +0100 +Subject: [PATCH] Avoid infinite loop in nss_dns getnetbyname [BZ #17630] + +--- + ChangeLog | 6 ++++++ + NEWS | 7 +++++-- + resolv/nss_dns/dns-network.c | 4 ++-- + 3 files changed, 13 insertions(+), 4 deletions(-) + +Index: git/NEWS +=================================================================== +--- git.orig/NEWS ++++ git/NEWS +@@ -24,7 +24,10 @@ Version 2.20 + 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, + 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, + 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354, +- 17625. ++ 17625, 17630. ++ ++* The nss_dns implementation of getnetbyname could run into an infinite loop ++ if the DNS response contained a PTR record of an unexpected format. + + * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag + under certain input conditions resulting in the execution of a shell for +Index: git/resolv/nss_dns/dns-network.c +=================================================================== +--- git.orig/resolv/nss_dns/dns-network.c ++++ git/resolv/nss_dns/dns-network.c +@@ -398,8 +398,8 @@ getanswer_r (const querybuf *answer, int + + case BYNAME: + { +- char **ap = result->n_aliases++; +- while (*ap != NULL) ++ char **ap; ++ for (ap = result->n_aliases; *ap != NULL; ++ap) + { + /* Check each alias name for being of the forms: + 4.3.2.1.in-addr.arpa = net 1.2.3.4 +Index: git/ChangeLog +=================================================================== +--- git.orig/ChangeLog ++++ git/ChangeLog +@@ -1,3 +1,9 @@ ++2014-12-16 Florian Weimer <[email protected]> ++ ++ [BZ #17630] ++ * resolv/nss_dns/dns-network.c (getanswer_r): Iterate over alias ++ names. ++ + 2014-12-15 Jeff Law <[email protected]> + + [BZ #16617]
meta/recipes-core/glibc/glibc_2.20.bb +1 -0
@@ -44,6 +44,7 @@ EGLIBCPATCHES = "\ CVEPATCHES = "\ file://CVE-2014-7817-wordexp-fails-to-honour-WRDE_NOCMD.patch \ file://CVE-2012-3406-Stack-overflow-in-vfprintf-BZ-16617.patch \ + file://CVE-2014-9402_endless-loop-in-getaddr_r.patch \ " LIC_FILES_CHKSUM = "file://LICENSES;md5=e9a558e243b36d3209f380deb394b213 \ file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
Signature · 1 line
1.9.1