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authorOvidiu Panait <ovidiu.panait@windriver.com>2020-09-01 12:22:00 +0300
committerArmin Kuster <akuster808@gmail.com>2020-09-03 08:28:37 -0700
commitd7b41ced4b9a9a68083b0fcceff3b226298cff8b (patch)
tree03ec3cfb6aa87e35f4fa14fc3af29e0994765c4c /meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2020-15861-0002.patch
parentb72b233d268c51376ecfa277ea8346621f632467 (diff)
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net-snmp: Fix CVE-2020-15861 and CVE-2020-15862
Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following. Net-SNMP through 5.7.3 has Improper Privilege Management because SNMP WRITE access to the EXTEND MIB provides the ability to run arbitrary commands as root. References: https://nvd.nist.gov/vuln/detail/CVE-2020-15861 https://nvd.nist.gov/vuln/detail/CVE-2020-15862 Upstream patches: https://github.com/net-snmp/net-snmp/commit/2b3e300ade4add03b889e61d610b0db77d300fc3 https://github.com/net-snmp/net-snmp/commit/9cfb38b0aa95363da1466ca81dd929989ba27c1f https://github.com/net-snmp/net-snmp/commit/114e4c2cec2601ca56e8afb1f441520f75a9a312 https://github.com/net-snmp/net-snmp/commit/2968b455e6f182f329746e2bca1043f368618c73 https://github.com/net-snmp/net-snmp/commit/4fd9a450444a434a993bc72f7c3486ccce41f602 https://github.com/net-snmp/net-snmp/commit/77f6c60f57dba0aaea5d8ef1dd94bcd0c8e6d205 CVE-2020-15861-0005.patch is the actual fix for CVE-2020-15861 and CVE-2020-15861-0001.patch through CVE-2020-15861-0004.patch are context patches needed by the fix to apply cleanly. Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
Diffstat (limited to 'meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2020-15861-0002.patch')
-rw-r--r--meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2020-15861-0002.patch44
1 files changed, 44 insertions, 0 deletions
diff --git a/meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2020-15861-0002.patch b/meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2020-15861-0002.patch
new file mode 100644
index 0000000000..e54a8b4acb
--- /dev/null
+++ b/meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2020-15861-0002.patch
@@ -0,0 +1,44 @@
+From 50118392c58c8d9554580373c0dbc542336b58a9 Mon Sep 17 00:00:00 2001
+From: Bart Van Assche <bvanassche@acm.org>
+Date: Thu, 16 May 2019 13:49:05 +0200
+Subject: [PATCH 2/5] libsnmp: Fix two recently introduced issues in the MIB
+ parsing code
+
+Ensure that the first argument passed to qsort() is not NULL. Free the memory
+that holds the directory contents.
+
+Fixes: 2b3e300ade4a ("CHANGES: libsnmp: Scan MIB directories in alphabetical order")
+
+CVE: CVE-2020-15861
+Upstream-Status: Backport [https://github.com/net-snmp/net-snmp/commit/9cfb38b0aa95363da1466ca81dd929989ba27c1f]
+
+Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
+---
+ snmplib/parse.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/snmplib/parse.c b/snmplib/parse.c
+index 51d119b..200ba25 100644
+--- a/snmplib/parse.c
++++ b/snmplib/parse.c
+@@ -4961,7 +4961,8 @@ static int scan_directory(char ***result, const char *dirname)
+ }
+ closedir(dir);
+
+- qsort(filenames, filename_count, sizeof(filenames[0]), elemcmp);
++ if (filenames)
++ qsort(filenames, filename_count, sizeof(filenames[0]), elemcmp);
+ *result = filenames;
+
+ return filename_count;
+@@ -5040,6 +5041,7 @@ add_mibdir(const char *dirname)
+ File = oldFile;
+ if (ip)
+ fclose(ip);
++ free(filenames);
+ return (count);
+ }
+ else
+--
+2.17.1
+