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CWE-203

826 CVEs • Abstraction: Base

Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

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CVEs (826)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
3Debian
EclipseOracle
7Communications Cloud Native Core Policy
Debian LinuxEnterprise Manager Base Platform+4 more
May 13, 2026
Jun 16, 2017
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
Jetty through 9.4.x is prone to a timing channel in util/security/Password.java, which makes it easier for remote attackers to obtain access by observing elapsed times before rejection of incorrect passwords.
1Watchguard
1Fireware
May 13, 2026
Apr 22, 2017
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
WatchGuard Fireware allows user enumeration, e.g., in the Firebox XML-RPC login handler. A login request that contains a blank password sent to the XML-RPC agent in Fireware v11.12.1 and earlier returns different respons...Show more
WatchGuard Fireware allows user enumeration, e.g., in the Firebox XML-RPC login handler. A login request that contains a blank password sent to the XML-RPC agent in Fireware v11.12.1 and earlier returns different responses for valid and invalid usernames. An attacker could exploit this vulnerability to enumerate valid usernames on an affected Firebox.Show less
3Canonical
Nettle ProjectRedhat
6Enterprise Linux Desktop
Enterprise Linux Hpc NodeEnterprise Linux Server+3 more
May 13, 2026
Apr 14, 2017
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.
1Revive Adserver
1Revive Adserver
May 13, 2026
Mar 28, 2017
N/A· v4
5.3 MEDIUM· v3
5.0 MEDIUM· v2
Revive Adserver before 3.2.3 suffers from Information Exposure Through Discrepancy. It is possible to check whether or not an email address was associated to one or more user accounts on a target Revive Adserver instance...Show more
Revive Adserver before 3.2.3 suffers from Information Exposure Through Discrepancy. It is possible to check whether or not an email address was associated to one or more user accounts on a target Revive Adserver instance by examining the message printed by the password recovery system. Such information cannot however be used directly to log in to the system, which requires a username.Show less
6Canonical
DebianNodejs+3 more
7Debian Linux
LinuxLinux Enterprise+4 more
May 6, 2026
Jun 20, 2016
N/A· v4
5.5 MEDIUM· v3
2.1 LOW· v2
The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timin...Show more
The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timing side-channel attack.Show less
4Canonical
MozillaOracle+1 more
15Enterprise Linux Desktop
Enterprise Linux EusEnterprise Linux Server+12 more
Apr 29, 2026
Feb 8, 2013
N/A· v4
N/A· v3
4.3 MEDIUM· v2
The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows...Show more
The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.Show less
1Woppoware
1Postmaster
Apr 16, 2026
May 18, 2005
N/A· v4
N/A· v3
5.0 MEDIUM· v2
The web mail service in Woppoware PostMaster 4.2.2 (build 3.2.5) generates different error messages depending on whether a user exists or not, which allows remote attackers to determine valid usernames.
1Adobe
1Svg Viewer
Apr 16, 2026
May 5, 2005
N/A· v4
N/A· v3
5.0 MEDIUM· v2
The NPSVG3.dll ActiveX control for Adobe SVG Viewer 3.02 and earlier, when running on Internet Explorer, allows remote attackers to determine the existence of arbitrary files by setting the src property to the target fil...Show more
The NPSVG3.dll ActiveX control for Adobe SVG Viewer 3.02 and earlier, when running on Internet Explorer, allows remote attackers to determine the existence of arbitrary files by setting the src property to the target filename and using Javascript to determine if the web page immediately stops loading, which indicates whether the file exists or not.Show less
1Sophos
1Astaro Security Linux
Apr 16, 2026
Dec 31, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
The firewall in Astaro Security Linux before 4.024 sends responses to SYN-FIN packets, which makes it easier for remote attackers to obtain information about the system and construct specialized attacks.
1Nettica
1Intellipeer Email Server
Apr 16, 2026
Dec 31, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Nettica Corporation INTELLIPEER Email Server 1.01 displays different error messages for valid and invalid account names, which allows remote attackers to determine valid account names.
1Argosoft
1Ftp Server
Apr 16, 2026
Dec 31, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
ArGoSoft FTP before 1.4.2.1 generates an error message if the user name does not exist instead of prompting for a password, which allows remote attackers to determine valid usernames.
1Yabbforumsoftware
1Yet Another Bulletin Board
Apr 16, 2026
Nov 23, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
YaBB 1 SP 1.3.1 displays different error messages when a user exists or not, which makes it easier for remote attackers to identify valid users and conduct a brute force password guessing attack.
1Ibm
1Aix
Apr 16, 2026
Nov 23, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
AIX 4.3.3 through AIX 5.1, when direct remote login is disabled, displays a different message if the password is correct, which allows remote attackers to guess the password via brute force methods.
1Gnu
1Cvs
Apr 16, 2026
Oct 20, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
CVS 1.11.x before 1.11.17, and 1.12.x before 1.12.9, allows remote attackers to determine the existence of arbitrary files and directories via the -X command for an alternate history file, which causes different error me...Show more
CVS 1.11.x before 1.11.17, and 1.12.x before 1.12.9, allows remote attackers to determine the existence of arbitrary files and directories via the -X command for an alternate history file, which causes different error messages to be returned.Show less
1Proftpd
1Proftpd
Apr 16, 2026
Oct 15, 2004
N/A· v4
N/A· v3
5.0 MEDIUM· v2
ProFTPD 1.2.x, including 1.2.8 and 1.2.10, responds in a different amount of time when a given username exists, which allows remote attackers to identify valid usernames by timing the server response.
1Novell
1Ichain
Apr 16, 2026
Aug 27, 2003
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Novell iChain 2.2 before Support Pack 1 uses a shorter timeout for a non-existent user than a valid user, which makes it easier for remote attackers to guess usernames and conduct brute force password guessing.
3Openbsd
OpenpkgSiemens
4Openpkg
OpensshScalance X204rna Ecc Firmware+1 more
Apr 16, 2026
May 12, 2003
N/A· v4
N/A· v3
5.0 MEDIUM· v2
OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user does not exist, which allows remote attackers to determine valid usernames via a timing attack.
3Freebsd
OpenbsdOpenssl
3Freebsd
OpenbsdOpenssl
Apr 16, 2026
Mar 3, 2003
N/A· v4
N/A· v3
5.0 MEDIUM· v2
ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that ma...Show more
ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the "Vaudenay timing attack."Show less
1Joetesta
1Hellbent
Apr 16, 2026
Dec 31, 2002
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Joe Testa hellbent 01 allows remote attackers to determine the full path of the web root directory via a GET request with a relative path that includes the root's parent, which generates a 403 error message if the parent...Show more
Joe Testa hellbent 01 allows remote attackers to determine the full path of the web root directory via a GET request with a relative path that includes the root's parent, which generates a 403 error message if the parent is incorrect, but a normal response if the parent is correct.Show less
1Phildev
1Ipfilter
Apr 16, 2026
Aug 12, 2002
N/A· v4
N/A· v3
5.0 MEDIUM· v2
IPFilter 3.4.25 and earlier sets a different TTL when a port is being filtered than when it is not being filtered, which allows remote attackers to identify filtered ports by comparing TTLs.