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SUSE:SLE-12-SP2:GA
glibc.7732
nss-dns-buffer-overflow.patch
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File nss-dns-buffer-overflow.patch of Package glibc.7732
2015-04-21 Arjun Shankar <arjun.is@lostca.se> [BZ #18287] * resolv/nss_dns/dns-host.c (getanswer_r): Adjust buffer length based on padding. (CVE-2015-1781) Index: glibc-2.19/resolv/nss_dns/dns-host.c =================================================================== --- glibc-2.19.orig/resolv/nss_dns/dns-host.c +++ glibc-2.19/resolv/nss_dns/dns-host.c @@ -618,7 +618,8 @@ getanswer_r (const querybuf *answer, int int have_to_map = 0; uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct host_data); buffer += pad; - if (__builtin_expect (buflen < sizeof (struct host_data) + pad, 0)) + buflen = buflen > pad ? buflen - pad : 0; + if (__builtin_expect (buflen < sizeof (struct host_data), 0)) { /* The buffer is too small. */ too_small:
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