CVE-2013-4206
published 2013-08-19CVE-2013-4206: Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly…
PriorityP429medium6.8CVSS 2.0
AVNACMAuNCPIPAP
EPSS
2.48%
82.8th percentile
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
Affected
30 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | filezilla | < filezilla 3.7.3-1 (bookworm) | filezilla 3.7.3-1 (bookworm) |
| debian | putty | < filezilla 3.7.3-1 (bookworm) | filezilla 3.7.3-1 (bookworm) |
| filezilla | filezilla | >= 0 < 3.7.3-1 | 3.7.3-1 |
| filezilla | filezilla | >= 0 < 3.7.3-1 | 3.7.3-1 |
| filezilla | filezilla | >= 0 < 3.7.3-1 | 3.7.3-1 |
| filezilla | filezilla | >= 0 < 3.7.3-1 | 3.7.3-1 |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | — | — |
| putty | putty | >= 0 < 0.63-1 | 0.63-1 |
CVSS provenance
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv6.8MEDIUM
vendor_debian6.8LOW
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Debian
CVE-2013-4207: filezilla - Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cau...
vendor_debian·2013·CVSS 6.8
CVE-2013-4207 [MEDIUM] CVE-2013-4207: filezilla - Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cau...
Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
Scope: local
bookworm: resolved (fixed in 3.7.3-1)
bullseye: resolved (fixed in 3.7.3-1)
forky: resolved (fixed in 3.7.3-1)
sid: resolved (fixed in 3.7.3-1)
trixie: resolved (fixed in 3.7.3-1)
Debian
CVE-2013-4206: filezilla - Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0....
vendor_debian·2013·CVSS 6.8
CVE-2013-4206 [MEDIUM] CVE-2013-4206: filezilla - Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0....
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
Scope: local
bookworm: resolved (fixed in 3.7.3-1)
bullseye: resolved (fixed in 3.7.3-1)
forky: resolved (fixed in 3.7.3-1)
sid: resolved (fixed in 3.7.3-1)
trixie: resolved (fixed in 3.7.3-1)
GHSA
GHSA-gqcg-rpgj-92fp: Buffer overflow in sshbn
ghsa_unreviewed·2022-05-13·CVSS 6.8
CVE-2013-4207 [MEDIUM] CWE-119 GHSA-gqcg-rpgj-92fp: Buffer overflow in sshbn
Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
GHSA
GHSA-h3qw-gcpw-f6mg: Heap-based buffer underflow in the modmul function in sshbn
ghsa_unreviewed·2022-05-13
CVE-2013-4206 [MEDIUM] CWE-119 GHSA-h3qw-gcpw-f6mg: Heap-based buffer underflow in the modmul function in sshbn
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
OSV
CVE-2013-4207: Buffer overflow in sshbn
osv·2013-08-19·CVSS 6.8
CVE-2013-4207 [MEDIUM] CVE-2013-4207: Buffer overflow in sshbn
Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
OSV
CVE-2013-4206: Heap-based buffer underflow in the modmul function in sshbn
osv·2013-08-19·CVSS 6.8
CVE-2013-4206 [MEDIUM] CVE-2013-4206: Heap-based buffer underflow in the modmul function in sshbn
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake [fedora-all]
bugzilla·2013-08-05·CVSS 6.8
CVE-2013-4852 [MEDIUM] CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake [fedora-all]
CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when availa
Bugzilla
CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake [epel-all]
bugzilla·2013-08-05·CVSS 6.8
CVE-2013-4852 [MEDIUM] CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake [epel-all]
CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when ava
Bugzilla
CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake
bugzilla·2013-08-05·CVSS 6.8
CVE-2013-4206 [MEDIUM] CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake
CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 putty: Integer overflow, leading to heap-based buffer overflow during SSH handshake
An integer overflow, leading to heap-based buffer overflow flaw was found in the way DSS and RSA implementation of PuTTY, a SSH, telnet, and rlogin client, used to process certain SSH handshake messages. A rogue SSH server could issue a specially-crafted SSH handshake message that, when processed in PuTTY client would lead to client crash or, potentially, arbitrary code execution with the privileges of the user running the client.
References:
[1] http://www.search-lab.hu/advisories/secadv-20130722
Upstream bug report:
[2] http://winscp.net/tracker/show_bug.cgi?id=1017
Relevant patch:
[3] http://svn.tartarus.org/sgt?view=revision&sortby=date&revisio
http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.htmlhttp://secunia.com/advisories/54379http://secunia.com/advisories/54533http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.htmlhttp://www.debian.org/security/2013/dsa-2736http://www.openwall.com/lists/oss-security/2013/08/06/11http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.htmlhttp://secunia.com/advisories/54379http://secunia.com/advisories/54533http://svn.tartarus.org/sgt/putty/sshbn.c?sortby=date&r1=9977&r2=9976&pathrev=9977http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.htmlhttp://www.debian.org/security/2013/dsa-2736http://www.openwall.com/lists/oss-security/2013/08/06/11
2013-08-19
Published