[oe-commits] yanjun.zhu : perl: fix for CVE-2010-4777

[git at git.openembedded.org]

Module: openembedded-core.git
Branch: master-next
Commit: 368df9f13ddf124e6aaaec06c02ab698c9e0b6c3
URL:    http://git.openembedded.org/?p=openembedded-core.git&a=commit;h=368df9f13ddf124e6aaaec06c02ab698c9e0b6c3

Author: yanjun.zhu <yanjun.zhu at windriver.com>
Date:   Tue May 20 09:27:47 2014 +0800

perl: fix for CVE-2010-4777

The Perl_reg_numbered_buff_fetch function in Perl 5.10.0, 5.12.0,
5.14.0, and other versions, when running with debugging enabled,
allows context-dependent attackers to cause a denial of service
(assertion failure and application exit) via crafted input that
is not properly handled when using certain regular expressions,
as demonstrated by causing SpamAssassin and OCSInventory to
crash.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-4777
Signed-off-by: yanjun.zhu <yanjun.zhu at windriver.com>
Signed-off-by: Roy Li <rongqing.li at windriver.com>
Signed-off-by: Saul Wold <sgw at linux.intel.com>

---

 .../perl-5.14.3-fix-CVE-2010-4777.patch            | 45 ++++++++++++++++++++++
 meta/recipes-devtools/perl/perl-native_5.14.3.bb   |  3 +-
 meta/recipes-devtools/perl/perl_5.14.3.bb          |  3 +-
 3 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/meta/recipes-devtools/perl/perl-5.14.3/perl-5.14.3-fix-CVE-2010-4777.patch b/meta/recipes-devtools/perl/perl-5.14.3/perl-5.14.3-fix-CVE-2010-4777.patch
new file mode 100644
index 0000000..e0dcf41
--- /dev/null
+++ b/meta/recipes-devtools/perl/perl-5.14.3/perl-5.14.3-fix-CVE-2010-4777.patch
@@ -0,0 +1,45 @@
+perl:fix for CVE-2010-4777
+
+Upstream-Status: Backport
+    
+The Perl_reg_numbered_buff_fetch function in Perl 5.10.0, 5.12.0,
+5.14.0, and other versions, when running with debugging enabled,
+allows context-dependent attackers to cause a denial of service
+(assertion failure and application exit) via crafted input that
+is not properly handled when using certain regular expressions,
+as demonstrated by causing SpamAssassin and OCSInventory to
+crash.
+
+http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-4777
+
+Signed-off-by: yanjun.zhu <yanjun.zhu at windriver.com>
+--- a/regcomp.c
++++ b/regcomp.c
+@@ -11868,8 +11868,25 @@ Perl_save_re_context(pTHX)
+ 
+ 		if (gvp) {
+ 		    GV * const gv = *gvp;
+-		    if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
+-			save_scalar(gv);
++		    if (SvTYPE(gv) == SVt_PVGV && GvSV(gv)) {
++			/* this is a copy of save_scalar() without the GETMAGIC call, RT#76538 */
++			SV ** const sptr = &GvSVn(gv);
++			SV * osv = *sptr;
++			SV * nsv = newSV(0);
++			save_pushptrptr(SvREFCNT_inc_simple(gv),
++			SvREFCNT_inc(osv), SAVEt_SV);
++			if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) &&
++			    SvTYPE(osv) != SVt_PVGV) {
++			    if (SvGMAGICAL(osv)) {
++				const bool oldtainted = PL_tainted;
++				SvFLAGS(osv) |= (SvFLAGS(osv) &
++				    (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
++				PL_tainted = oldtainted;
++			    }
++			    mg_localize(osv, nsv, 1);
++			}
++			*sptr = nsv;
++		    }
+ 		}
+ 	    }
+ 	}
diff --git a/meta/recipes-devtools/perl/perl-native_5.14.3.bb b/meta/recipes-devtools/perl/perl-native_5.14.3.bb
index 2ef0a51..c38be41 100644
--- a/meta/recipes-devtools/perl/perl-native_5.14.3.bb
+++ b/meta/recipes-devtools/perl/perl-native_5.14.3.bb
@@ -17,7 +17,8 @@ SRC_URI = "http://www.cpan.org/src/5.0/perl-${PV}.tar.gz \
            file://MM_Unix.pm.patch \
            file://debian/errno_ver.diff \
            file://dynaloaderhack.patch \
-           file://perl-build-in-t-dir.patch"
+           file://perl-build-in-t-dir.patch \
+           file://perl-5.14.3-fix-CVE-2010-4777.patch "
 
 SRC_URI[md5sum] = "f6a3d878c688d111b495c87db56c5be5"
 SRC_URI[sha256sum] = "03638a4f01bc26b81231233671524b4163849a3a9ea5cc2397293080c4ea339f"
diff --git a/meta/recipes-devtools/perl/perl_5.14.3.bb b/meta/recipes-devtools/perl/perl_5.14.3.bb
index c307b99..fcd665b 100644
--- a/meta/recipes-devtools/perl/perl_5.14.3.bb
+++ b/meta/recipes-devtools/perl/perl_5.14.3.bb
@@ -74,7 +74,8 @@ SRC_URI = "http://www.cpan.org/src/5.0/perl-${PV}.tar.gz \
         file://config.sh-32-be \
         file://config.sh-64 \
         file://config.sh-64-le \
-        file://config.sh-64-be"
+        file://config.sh-64-be \
+        file://perl-5.14.3-fix-CVE-2010-4777.patch "
 #	file://debian/fakeroot.diff
 
 SRC_URI[md5sum] = "f6a3d878c688d111b495c87db56c5be5"