sccontextcreate in ctx.c in libopensc in OpenSC 0.19.0 has a memory leak, as demonstrated by a call from eidenv.
An issue was discovered in the pamp11 component 0.2.0 and 0.3.0 for OpenSC. If a smart card creates a signature with a length longer than 256 bytes, this triggers a buffer overflow. This may be the case for RSA keys with 4096 bits depending on the signature scheme.
Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs.
A vulnerability was found in OpenSC. This issue causes a buffer overrun in the pkcs15 cardoshaveverifyrcpackage. This flaw allows an attacker to supply a smart card package with a malformed ASN1 context. The cardoshaveverifyrcpackage function scans the ASN1 buffer for two tags, where the remaining length is wrongly calculated due to a moved starting pointer, leading to a possible heap-based buffer out-of-bounds read. In cases where ASN is enabled while compiling, this problem causes a crash, and further information leaks or more damage is likely.
Several buffer overflows when handling responses from a TCOS Card in tcosselectfile in libopensc/card-tcos.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
Several buffer overflows when handling responses from a Gemsafe V1 Smartcard in gemsafegetcertlen in libopensc/pkcs15-gemsafeV1.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
Several buffer overflows when handling responses from a Muscle Card in musclelistfiles in libopensc/card-muscle.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
OpenSC before 0.20.0 has a double free in coolkeyfreeprivatedata because coolkeyaddobject in libopensc/card-coolkey.c lacks a uniqueness check.
Several buffer overflows when handling responses from an ePass 2003 Card in decryptresponse in libopensc/card-epass2003.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
A double free when handling responses from a smartcard in scfilesetsecattr in libopensc/sc.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
Several buffer overflows when handling responses from a CAC Card in cacgetserialnrfromCUID in libopensc/card-cac.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
Several buffer overflows when handling responses from a Cryptoflex card in readpublickey in tools/cryptoflex-tool.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
A buffer overflow when handling string concatenation in utilacltostr in tools/util.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
A single byte buffer overflow when handling responses from an esteid Card in scpkcs15emuesteidinit in libopensc/pkcs15-esteid.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
pkcs15-tool in OpenSC before 0.11.6 does not apply security updates to a smart card unless the card's label matches the "OpenSC" string, which might allow physically proximate attackers to exploit vulnerabilities that the card owner expected were patched, as demonstrated by exploitation of CVE-2008-2235.
A double free when handling responses from an HSM Card in scpkcs15emuschsminit in libopensc/pkcs15-sc-hsm.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
A double free when handling responses in readfile in tools/egk-tool.c (aka the eGK card tool) in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
A flaw was found in OpenSC packages that allow a potential PIN bypass. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. This issue poses a security risk, particularly for OS logon/screen unlock and for small, permanently connected tokens to computers. Additionally, the token can internally track login status. This flaw allows an attacker to gain unauthorized access, carry out malicious actions, or compromise the system without the user's awareness.
OpenSC before 0.20.0-rc1 has an out-of-bounds access of an ASN.1 Octet string in asn1decodeentry in libopensc/asn1.c.
OpenSC before 0.20.0-rc1 has an out-of-bounds access of an ASN.1 Bitstring in decodebitstring in libopensc/asn1.c.
Last updated 10 April 2025
OpenSC OpenSC.tokend has an Arbitrary File Creation/Overwrite Vulnerability
An issue was discovered in OpenSC through 0.19.0 and 0.20.x through 0.20.0-rc3. libopensc/card-setcos.c has an incorrect read operation during parsing of a SETCOS file attribute.
The gemsafe GPK smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in scpkcs15emugemsafeGPKinit.
The Oberthur smart card software driver in OpenSC before 0.21.0-rc1 has a heap-based buffer overflow in scoberthurreadfile.
The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcosdecipher.
Last updated 10 April 2025
A heap double free issue was found in Opensc before version 0.22.0 in scpkcs15freetokeninfo.
Heap buffer overflow issues were found in Opensc before version 0.22.0 in pkcs15-oberthur.c that could potentially crash programs using the library.
A use after return issue was found in Opensc before version 0.22.0 in insertpin function that could potentially crash programs using the library.