|
 |
| SecurityReason | ||
| WLB | ||
| Services | ||
| RSS | ||
| Corporate | ||
| Note | ||
If you have found a vulnerability, please send to our SecurityAlert Database : |
||
Home  SecurityAlert Database |
||||
SecurityAlert : 6976 CVE : CVE-2010-0006 CWE : CWE-20 SecurityRisk : High  (About) Remote Exploit : Yes Local Exploit : No Victim interaction required : No Exploit Available : No Credit : David Miller Published : 28.01.2010
Advisory Content : This fixes CERT-FI FICORA #341748 Discovered by Olli Jarva and Tuomo Untinen from the CROSS project at Codenomicon Ltd. Just like in CVE-2007-4567, we can't rely upon skb_dst() being non-NULL at this point. We fixed that in commit e76b2b2567b83448c2ee85a896433b96150c92e6 ("[IPV6]: Do no rely on skb->dst before it is assigned.") However commit 483a47d2fe794328d29950fe00ce26dd405d9437 ("ipv6: added net argument to IP6_INC_STATS_BH") put a new version of the same bug into this function. Complicating analysis further, this bug can only trigger when network namespaces are enabled in the build. When namespaces are turned off, the dev_net() does not evaluate it's argument, so the dereference would not occur. So, for a long time, namespaces couldn't be turned on unless SYSFS was disabled. Therefore, this code has largely been disabled except by people turning it on explicitly for namespace development. With help from Eugene Teo <eugene@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> CC: stable <stable@kernel.org> --- net/ipv6/exthdrs.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index df159ff..4bac362 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -559,6 +559,11 @@ static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb) return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev); } +static inline struct net *ipv6_skb_net(struct sk_buff *skb) +{ + return skb_dst(skb) ? dev_net(skb_dst(skb)->dev) : dev_net(skb->dev); +} + /* Router Alert as of RFC 2711 */ static int ipv6_hop_ra(struct sk_buff *skb, int optoff) @@ -580,8 +585,8 @@ static int ipv6_hop_ra(struct sk_buff *skb, int optoff) static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff) { const unsigned char *nh = skb_network_header(skb); + struct net *net = ipv6_skb_net(skb); u32 pkt_len; - struct net *net = dev_net(skb_dst(skb)->dev); if (nh[optoff + 1] != 4 || (optoff & 3) != 2) { LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n", -- 1.6.5 References : https://bugzilla.redhat.com/show_bug.cgi?id=555217
http://www.securityfocus.com/bid/37810
http://www.osvdb.org/61876
http://www.openwall.com/lists/oss-security/2010/01/14/2
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.4
http://security-tracker.debian.org/tracker/CVE-2010-0006
http://secunia.com/advisories/38333
http://secunia.com/advisories/38168
http://marc.info/?l=linux-netdev&m=126343325807340&w=2
http://lists.fedoraproject.org/pipermail/package-announce/2010-January/034250.html
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2570a4f5428bcdb1077622342181755741e7fa60
http://cert.fi/en/reports/2010/vulnerability341748.html
http://bugs.gentoo.org/show_bug.cgi?id=300951  Feedback : If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com. |
||||
| Alert | ||
Allow attacker to denial of service apache 2.2.17 server |
||
| Apache |  |
|
| PHP | |
|
» libzip 0.9.3 |
||
| ADT | ||
Protect your family and valuables with Home Security Systems |
||
- 2011-05-13| Copyright © SecurityReason.com. All Rights Reserved. |